Year 7 Algebra

You can practice Algebra II concepts right now by using Varsity Tutors’ free Algebra II Practice Tests. Lightning Race - Revise addition and subtraction 4. Here is a graphic preview for all of the Algebraic Expressions Worksheets. Factorisation is the reverse process of expanding and is a powerful tool in algebra at every level of mathematics. Introduction. Algebra 1 Test Practice. Lesson Plan Lounge Grade 7 Algebraic Expressions Standard 1. Primary Resources - free worksheets, lesson plans and teaching ideas for primary and elementary teachers. Shape Race - A game to revise shapes 2. The latest Tweets from Algebra UK (@Algebra_UK). Algebra Worksheets, Quizzes and Activities. On this page you'll find a variety of Pre-Algebra and Algebra topics. If length of the pole is 242 feet and pole is broken at a height of 105 feet from the ground, find the distance from base of pole to the point where its top touches ground. Topics covered in Year 7 are:-. Also, please note that these worksheets and their solutions were created by hand, Year 3, Year 4, Year 5, Year 6, Year 7, Year 8 Year 8 Algebra. Simply put, algebra is about finding the unknown or putting real life variables into equations and then solving them. Year 7 math printable worksheets, online practice and online tests. Find your total bill if. Grouped by level of study. Algebra can be a difficult subject to master. Welcome to McDougal Littell's Test Practice site. Unfortunately, many textbooks go straight to the rules, procedures, and formulas, forgetting that these are real life problems being solved and skipping the explanation of algebra at its core: using symbols to represent variables and missing factors in equations and. Grade 8 Mathematics – Pre-Algebra 2017 – 2018. Add and subtract monomials with exponents of one. Year 7 Algebra. Year 7 Year 8 Year 9 Year 10 Year 11 Bourne Academy Year 7 Maths. Login With Wonde. The year is divided into 2 parts - 7A and 7B. Faced with a lineup of Algebra II, Algebra II General, Enriched Algebra II, Integrated Algebra II, Advanced Algebra II, and Essentials of Algebra II, it’s difficult to know what’s right for any one child. An endless supply of Australian Curriculum, Victorian Curriculum and NSW Syllabus worksheets at your fingertips, enabling your school the means to deliver a quick and easy solution to curriculum delivery that is perfectly aligned to each Australian Curriculum, Victorian Curriculum and NSW Syllabus content description. General Quiz Addition Counting Data Division Estimation Geometry (Plane) Measurement Money Multiplication Numbers Pre-Algebra Subtraction Time. We hope that you find exactly what you need for your home or classroom!. Optional SATs papers were first created in 2003 alongside KS1, KS2 and KS3 SATs papers. So, I decided to try something different. Year 7 Science. You can select different variables to customize these Algebraic Expressions Worksheets for your needs. Algebra Questions Year 7 Grades 7-12 Math Curriculum - Algebra Equations - Free worksheets, games, studytools, tutorials and games on Variables, Evaluating Equations, Writing. The Year 6/7 baseline test is now available. To start practicing, just click on any link. 0 PDF: Download:. On this page you'll find a variety of Pre-Algebra and Algebra topics. GO Math Textbooks. Selection of excellent educational maths and literacy games, organised by topic and age group - Topmarks Play these fun Maths Games for 11-14 year olds. Formulas - Surface area, volume, rate and density. Maths Year 6 Games. With this you have a good understanding of basic algebra, and now you should be able to solve other equations like 6 + k = 11 or 11 - m = 7. Easyalgebra. An asymptote is a line that the graph of a function approaches but never touches. Averages (Means, Medians, and Modes) Sample items for each of these categories are presented later in this section. Study Guide Lesson Plans End term test Mental Computation. One month you paid $7. View Demo Login Login. Questions on simplifying expressions, solving equations, factoring expressions,are included. Algebra Worksheets Pre-Algebra, Algebra 1, and Algebra 2 Worksheets. In Year 7 Physical Education, students are provided with the opportunity to develop their fitness level and fundamental motor skills through participation in a variety of recreational and competitive sporting situations including volleyball, racquet sports, footballs, cricket, hockey, T-ball, basketball, netball. Recommended Prerequisites You should have completed AP Physics 1 or a comparable introductory physics course and should have taken or be concurrently taking pre-calculus or an equivalent course. She has 21 coins in her piggy bank totaling $2. it includes learning objectives, key words, literacy activites and self assessment for each lesson. Review of the 5th edition by Professor Farenick for the International Linear Algebra Society. Math Games offers online games and printable worksheets to make learning math fun. Non-Calculator. Disney II will provide a rigorous and relevant curriculum in a nurturing and inclusive community whose members – parents, teachers, and students – support each other’s intellectual and emotional growth. While you would normally start by computing brackets first, if your expression contains algebra, you can't simplify inside the brackets. The original version is available at. You can select different variables to customize these Algebra Worksheets for your needs. Introduction to Linear Algebra, Fifth Edition (2016) Publication May 2016. To start practising, just click on any link. Grade 8 Mathematics – Pre-Algebra 2017 – 2018. Algebra Cheat Sheet Basic Properties & Facts Arithmetic Operations ( ),0 bab abacabca cc a b aaac cbcbb c acadbcacadbc bdbdbdbd abbaabab cddcccc a abacb ad bca ac bc d. In this course, you will be introduced to basic algebraic operations and concepts, as well as the structure and use of algebra. How to Use the Calculator. Also listed are worksheets covering number patterns, function tables and some on the basics of powers (exponents and bases. Answer as many questions as you can, in any order. This obviously means no more discs (and, importantly, no more need for expensive disc replacements). Introduction. An algebraic expression consists of a group of terms separated by operators, which are either plus signs or minus signs. August 2018 Algebra I, Part III. With over 2000 practice exercises and 35 review tests, this workbook will develop the skills, confidence and competencies required to excel in Maths. Abstract Algebra begins at the undergraduate level, but Chapters 7{9 are written at a level that we consider appropriate for a student who has spent the better part of a year learning abstract algebra. Each worksheet is randomly generated and self marking. d, you first find the greatest multiple of. Connor has improved so much this year, his confidence, organization & overall results have come from a C to a A. £ £24,859 to £40,520 per year 7 of the Best Light Worksheets and Resources for KS1 & KS2 Science. Play these fun Maths Games for 11-14 year olds. Free Maths for 7 Year Olds Worksheets for children to learn math and numbers are available in this page. Help your child get ahead with Education resources, designed specifically with parents in mind. Members receive unlimited access to 49,000+ cross-curricular educational resources, including interactive activities, clipart, and abctools custom worksheet generators. Year 7 - Function Machines Homework Question 1 - Fill in blanks where the question marks are, like we did in class. Tes Global Ltd is registered in England (Company No 02017289) with its registered office at 26 Red Lion Square London WC1R 4HQ. Practice, Practice & More Practice. Please share our worksheets. In general, when an integer. Year 7 Year 8 Year 9 Year 10 Year 11 Bourne Academy Year 7 Maths. A superb range of maths worksheets for secondary school children in year 7 (aged 11-12). The College Algebra exam covers material that's usually taught in a one-semester college course in algebra. Redbird Language Arts & Writing (2–7) NEW: Personalized learning solution that helps students reach their full potential as writers. Questions on Fractions and Operations on Fractions for grade 7. (yes, 2 programs in one year, because he ha. Suggested Ideas and Approaches for a Transition Year Programme 1. 2 6 2 marks for answer, or 1 mark for sight of. Become a Member. Worksheets for earlier or later years may still be suitable for you. com is an online resource used every day by thousands of teachers, students and parents. txt) or read online for free. Snooping girls should be tied, gagged and not heard. Algebra Placement Test The Algebra Placement Test is composed of items from three curricular areas: elementary algebra, coordinate geometry, and intermediate algebra. Whilst not published for a number of years, Optional SATs are still a helpful and useful tool. Pre-Algebra WorksheetWorks. Education resources, designed specifically with parents in mind. While you would normally start by computing brackets first, if your expression contains algebra, you can't simplify inside the brackets. She has 21 coins in her piggy bank totaling $2. There are some number investigations, puzzlers and numeracy strategies. These maths worksheets on algebra are split into several sections. General Quiz Addition Counting Data Division Estimation Geometry (Plane) Measurement Money Multiplication Numbers Pre-Algebra Subtraction Time. To start practising, just click on any link. Our book is intended for this course, and has grown directly out of our experience in teaching the course at Northern Illinois University. Free, printable pre-algebra worksheets covering the solving of simple equations. Book 7B covers Units 13 to 22. Algebra is about finding the unknown or it is about putting real life problems into equations and then solving them. In fact, there is nothing very much in the way of new maths, more a change of title, as much of the work would have been covered before in other categories. Questions on Fractions and Operations on Fractions for grade 7. This problem looks at the patterns on differently sized square grids. Solving word problems is also covered. It's very useful to have free worksheets to practice your understanding of key college algebra concepts. NLVM manipulatives for Algebra. Year 8 Algebra Test (Marks: /36) (Working Out: /10) Question 1 (3) Copy and complete the following table. By using these materials, students who will use the regular print. Please read the questions carefully and an. If you search our website, you will find lots of content. K-12 Louisiana Student Standards for Math. Engage your students with these Algebra Worksheets. In modern mathematics, the presentation through vector spaces is generally preferred, since it is more synthetic, more general (not limited to the finite-dimensional case), and conceptually simpler, although more abstract. The Year 6/7 baseline test is now available. The ability to analyze and create linear equations, inequalities, and functions is essential for success in college and career, as is the ability. We believe that all students can succeed in maths and we want to do all we can to make it happen. Enjoy! Here are links to other math websites: Private Tutoring; Triginometric Functions Tutorial. Number Algebra Money Shape, Position and Movement Number Games Free maths games aimed at 11-14 year olds which cover concepts such as equivalent fractions, number sequences, ordering decimals, lowest common multiples, prime factors, highest common factor and equivalent fractions. Online lessons provide demonstrations of key concepts, as well as interactive problems with contextual feedback. Introduction to Linear Algebra, Fifth Edition (2016) Publication May 2016. Remove All Ads. Also listed are worksheets covering number patterns, function tables and some on the basics of powers (exponents and bases. Grade 7 » Introduction Print this page. Number and Algebra teaching resources for Australia. Florida Algebra I EOC Online Practice Test 1 Directions: This practice test contains 65 multiple-choice questions. Common-Core Algebra Seen as Tougher went from requiring all 8th graders to take Algebra 1 to just the opposite policy under the common core—as of this year, all students must take Algebra 1. The academic content is the same as always and includes over 100 hours of multimedia instruction! However, each course is now delivered online as a 12-month subscription (per student). California Algebra Connections • Student Softbound Set with eBook: $59. Seventh grade math Here is a list of all of the math skills students learn in seventh grade! These skills are organized into categories, and you can move your mouse over any skill name to preview the skill. Algebra I (Common Core) – June ’17 [70] Question 37 37 Central High School had fi ve members on their swim team in 2010. How to Do Algebra. It provides us with a way to solve quadratic equations, simplify complicated expressions, and sketch non-linear relationships in Year 10 and beyond. You have all done a great job on Algebra this term. In addition to numbers, there are letters thrown into equations. This site offers multiple interactive quizzes and tests to improve your test-taking skills. Grade 7 algebra questions and problems with detailed solutions are presented. Year 7 Maths $27. 00 9781603284912. In this course, you will be introduced to basic algebraic operations and concepts, as well as the structure and use of algebra. 2 multiplied by 5, 7. in math and technology education. pdf), Text File (. com Wellesley-Cambridge Press and SIAM (for ordering information) Book Order Form. Year 7 CATs: what every parent needs to know. Year 6 Algebra Worksheet activities for introducing KS2 children to algebra in six differentiated levels by using shapes to represent different numbers. Any Equation. In fact, there is nothing very much in the way of new maths, more a change of title, as much of the work would have been covered before in other categories. - Trigonometry Identities. Yara runs 2 miles the first day. Some of the worksheets displayed are Name teacher numeracy year 7 8, Year 8 maths homework, Exercises in ks3 mathematics levels 3, Year 7, Maths year 7, Year 8 maths revision autumn term, Mathematics practice test, Mathematics. The goal is to find the unknown in the equation, and the core to solving algebra equations is preserving the equality. B Solve real-life and mathematical problems using numerical and algebraic expressions and equations. Download printables by topic below. This blog is not affiliated with any school, district, company, or organization. Students can submit previous years question papers and join Google AdSense revenue sharing. That multiple of. Skills available for Australia year 7 maths curriculum IXL's year 7 skills will be aligned to the Australian Curriculum soon! Until then, you can view a complete list of year 7 objectives below. Each math lesson provides in-depth instruction ideal for learners of all ages and abilities. Year 12 General. This site provides extension and enrichment activities that encourage a child to attempt additional homework and quizzes in specific areas of mathematics or to reinforce concepts already developed, including additional weekly homework for year 1 to. With our INTERNATIONAL content, EASY TO UNDERSTAND, FAST PACED lessons, YOU WILL SOON BE TOP OF THE CLASS and heading in the right direction to achieve your dream of a DYNAMIC CAREER. August 2018 Algebra I, Part III. Showing top 8 worksheets in the category - Year 7 Maths. From fractions, to percentages, to decimals, the many resources available at Cazoom Maths will ensure your child or pupil will be able to navigate their. A pole is broken such that top of the pole touches the ground. Optional SATs were designed to help teachers give children a relevant "SATs-like" assessment. So, for example, a worksheet for Year 11 is for students in their 11th year of school. Hide Ads About Ads. As your budding mathematician moves up to secondary school and starts KS3 maths, what new skills will they learn? Year 7 maths curriculum explained for parents | What your child learns in Y7 maths | TheSchoolRun. Introduction to Algebra - Independent Learning Task. Algebra Problems Year 7 To view the problem statement, double click on the problem title. Locker Problem- Imagine you are at a school that still has student lockers. A Quick Review of Algebra: Written in TeX and converted to the Adobe PDF format. Free math lessons, math help and lesson plans from basic math to algebra, geometry and beyond. Algebra Balance Scales – Solve simple linear equations using a balance beam representation. Start studying Year 7 Math, Number and Algebra, Number properties and patterns, Chapter 3. From fractions, to percentages, to decimals, the many resources available at Cazoom Maths will ensure your child or pupil will be able to navigate their. They can be downloaded for free by registering on the TES website. Alegbra Smash. Select from the list of tasks below which include illustrations of the year 7 standard: Number and Algebra. When solving age problems, you need to represent the following in terms of a variable: - the present ages of the people or things involved - the age, at the other specified time, of the people or things involved. This sections illustrates the process of solving equations of various forms. Solving word problems is also covered. Select one of the links below to get started. I speak for myself only. A simplified overview of the Year 7 curriculum. All worksheets have answer sheets, and each is available in pdf or doc format. £ £24,859 to £40,520 per year 7 of the Best Light Worksheets and Resources for KS1 & KS2 Science. The browser you are using is out of date and not officially supported. 7th grade math worksheets to engage children on different topics like algebra, pre-algebra, quadratic equations, simultaneous equations, exponents, consumer math, logs, order of operations, factorization, coordinate graphs and more. (4 votes, average: 4. Each kit has collected a great deal of wisdom from trial teachers which is available through the Manual, Task Cameos and. The game is based on the following Common Core Math Standards: CCSS 7. pdf View Download. x+y, X-5, etc. Year 7 Science. The figure shows the parabola, which is an upward facing, U shaped curve, and the vertical dashed line x = 1. Everyday low prices and free delivery on eligible orders. MYP Grade 7 Mathematics # TOPIC TITLE 1 Self Assessment Self Assessment - MYP Grade 7 Objective: Assessment 2 Algebraic expressions Algebraic expressions. Each textbook has a question book and a worked solutions book. Non-Calculator. The same school had 35 members in their chorus in 2010. Therefore: 2y + 3y2 = 2y + 3y2. com - id: 57b24d-MWQyZ. can be expressed as the product. Year 7 Algebra What is Algebra? The part of mathematics in which letters and other symbols are used to represent numbers and quantities in quations. An algebraic expression consists of a group of terms separated by operators, which are either plus signs or minus signs. ALEKS QuickTables is complimentary with any mathematics course, and can be enabled easily if it's not already automatically included. But, as with fractions, pupils can really struggle here. in composite science education and an M. The term compounding refers to interest earned not only on the original value, but on the accumulated value of the account. Algebra worksheet, Solving Equations worksheet, Math Reading Science Tests for Grades , Practice Sample Test, Free Online Worksheets Question 7: Solve the equation. Students need to refer to these sample question papers for class 7 maths and solve the questions. What is the expanded form of. Step-by-step lessons on solving basic algebra equations. One month you paid $7. FREE Year 2 Maths Assessment Tests - Perfect For KS1 Revision And Other Assessment Tasks I have written some fun Year 2 Maths Assessments I could do with my class. This site provides extension and enrichment activities that encourage a child to attempt additional homework and quizzes in specific areas of mathematics or to reinforce concepts already developed, including additional weekly homework for year 1 to. For example, enter 3x+2=14 into the text box to get a step-by-step explanation of how to solve 3x+2=14. You can choose to include answers and step-by-step solutions. 5: The equation y = x squared, minus 2x, minus 3 has the graph shown in Algebra Figure 7 below. To start practising, just click on any link. com print help!. Sample Problems From Intermediate Algebra Sample problems are under the links in the "Sample Problems" column and the corresponding review material is under the "Concepts" column. Algebra 1 and algebra 2 are the Maths courses included for students in their early and later stages of academics respectively. This site offers multiple interactive quizzes and tests to improve your test-taking skills. Year 12 Maths C (Mathematical Methods) - Linear Equations and Continuous Random Variables This worksheet contains 8 questions on linear equations and 10 questions on continuous randam variables, perfect for brushing up on these areas. If length of the pole is 242 feet and pole is broken at a height of 105 feet from the ground, find the distance from base of pole to the point where its top touches ground. For example: x or a Like terms can be added or subtracted For example: 2y and 3y are like terms. Also listed are worksheets covering number patterns, function tables and some on the basics of powers (exponents and bases. Algebra Year 7 (Developings) [Hilary Koll, Steve Mills] on Amazon. com web site. Printable Seventh Grade (Grade 7) Worksheets, Tests, and Activities Print our Seventh Grade (Grade 7) worksheets and activities, or administer them as online tests. Its main purpose is to be a diagnostic test—to find out what the student knows and does not know about these topics. In this course, you will be introduced to basic algebraic operations and concepts, as well as the structure and use of algebra. Description Students can use the folloing practice book to help with algebra problems inshaAllah. On this page you can read or download all things algebra algebra 2 unit 1 answers in PDF format. Number Algebra Money Shape, Position and Movement Number Games Free maths games aimed at 11-14 year olds which cover concepts such as equivalent fractions, number sequences, ordering decimals, lowest common multiples, prime factors, highest common factor and equivalent fractions. In the exam, questions can be twisted and asked in a different way but all the questions will be from the CBSE class 7 syllabus. It was a difficult math year for us. Snooping girls should be tied, gagged and not heard. Algebra has a reputation for being difficult, but Math Games makes struggling with it a thing of the past. Members receive unlimited access to 49,000+ cross-curricular educational resources, including interactive activities, clipart, and abctools custom worksheet generators. The Year 6/7 baseline test is now available. The proficiencies reinforce the significance of working mathematically within the. 2 multiplied by 5, 7. Algebra Balance Scales – Solve simple linear equations using a balance beam representation. Problem Solving 40 10. Ten key areas from the Year 7 curriculum have been identified to support Year 6 pupils in their transition into Year 7. By using these materials, students who will use the regular print. Seventh Grade Math Worksheets. The Algebra 1 Placement Exam is a district developed test based on the State’s 8th grade TEKS. 0- Knowledge of Algebra, Patterns, and Functions Topic B: Expressions, Equations, and Inequalities. Therefore: 2y + 3y2 = 2y + 3y2. The Year 7 maths / KS3 maths curriculum explained for parents. 2 by the number of people in each box: 7. makingmathmorefun. It is critical for every 7th grade student to know the CBSE class 7 Maths syllabus thoroughly. For each part there is a Pupils' Practice Book. This chapter introduces equations and the solution of equations involving addition, subtraction, multiplication and division. Disney II will provide a rigorous and relevant curriculum in a nurturing and inclusive community whose members – parents, teachers, and students – support each other’s intellectual and emotional growth. They are ideal for printing out in colour and laminating, making a long lasting resource. Showing top 8 worksheets in the category - Year 7 Algebra. These Algebra Worksheets are great for any classroom. ±) in the United States. systems of equations, functions, real numbers, inequalities, exponents, and polynomials, radical and rational expressions. , The type of relation shown by the below graph. Grade 7 algebra questions and problems with detailed solutions are presented. Seven less than x is x-7. Solving Linear Equations Learn how to solve simple algebriac equations like 4x - 5 = 3x + 7 Single variable only This tutorial is suitable for students in Year 9 or 10. Florida Algebra I EOC Online Practice Test 1 Directions: This practice test contains 65 multiple-choice questions. How Many? Sharing Pizzas; Breakdown of. Until the 19th century, linear algebra was introduced through systems of linear equations and matrices. The figure shows the parabola, which is an upward facing, U shaped curve, and the vertical dashed line x = 1. '15 [8] 18 Alicia has invented a new app for smart phones that two companies are interested in purchasing for a 2-year contract. Math by Kahoot! – Algebra. Algebra II - Probability REVIEW 1. Here is a graphic preview for all of the Algebraic Expressions Worksheets. Sometimes this frustration lasts only for the duration of a particularly challenging lesson plan. Table Patterns Go Wild! Age 7 to 11 Challenge Level:. My 10 year old has finished Algebra 1 and is waiting for the Algebra 2 course to start. 50 out of 5) You need to be a registered member to rate this. Year 7 literacy and numeracy catch-up premium: guide for schools additional funding to support year 7 pupils who did not achieve the expected standard in reading or maths at the end of key. Izghawa for Students. How to Do Algebra. Well, isnt this interesting that I would find this particular thread today of all days! Just this afternoon, my ds decided to come clean and tell me that he really is not getting the math lessons like he had claimed. Free math problem solver answers your algebra homework questions with step-by-step explanations. You have all done a great job on Algebra this term. Pairs 100 - Practice addition to 100 6. Over the next several years, the team increased by an average of 10 members per year. Sample Problems From Intermediate Algebra Sample problems are under the links in the "Sample Problems" column and the corresponding review material is under the "Concepts" column. The latest Tweets from Algebra UK (@Algebra_UK). 5: The equation y = x squared, minus 2x, minus 3 has the graph shown in Algebra Figure 7 below. Depending on the area, students may take Years 7 and 8 at a full primary school, a secondary school, or a separate intermediate. Free step-by-step solutions to millions of textbook and homework questions! - Slader. Lesson Plan Lounge Grade 7 Algebraic Expressions Standard 1. Click below to find resources for your revision. Spot the Difference Game 1 - Practice subtraction to 10 7. Some of the worksheets for this concept are Two step word problems, Two step equations date period, Multistep word problems the student text includes some, Algebra word problems no problem, One steptwo step word problems name for each one step, Word problems work easy multi step word. The original A Maths Dictionary for Kids is an animated, interactive online math dictionary for students which explains over 630 common mathematical terms and math words in simple language with definitions, examples, activities, practice and calculators. Year 7 NonArabic. Test and Worksheet Generators for Math Teachers. By the end of Year 7, students solve problems involving the comparison, addition and subtraction of integers. Each Unit has its own set of interactive tutorials - one for each section within that unit. x + 5 = 16 , n - 3 = 12, 4n = 8 , y/4 = 3, 2x + 3 = 9. a Write expressions that record operations with numbers and with letters standing for numbers. Students can submit previous years question papers and join Google AdSense revenue sharing. 7 Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e. She purchases a doll for $450. Simply put, algebra is about finding the unknown or putting real life variables into equations and then solving them. ALGEBRA 2 APPENDIX B HOMEWORK PROBLEMS If 150 empty water bottles weigh 4. Pre-algebra and algebra lessons, from negative numbers through pre-calculus. Each worksheet is in PDF and hence can printed out for use in school or at home. Algebra has been introduced using only whole numbers for pronumerals. You pay a fee for each extra minute you use. Then, to find out the degrees that each sector is, you multiply 7. This blog is not affiliated with any school, district, company, or organization. that is less than or equal to. Algebra Key Skills: To develop students fluency and skills in relation to: Factoring expressions Common factors Difference of two squares Sum and difference of two cubes (Higher) The perfect square Functions. x+y, X-5, etc. Use the rule given to work out what the OUT numbers on the function machine would be. Simply edit, add, delete, or rearrange questions. Post to: Tweet. Algebra Practice Workbook Add to Favourites. Virginia; Mozilla/5. This problem looks at the patterns on differently sized square grids. Sometimes it lasts an entire year. Free math problem solver answers your algebra homework questions with step-by-step explanations. - Trigonometry Identities.