Trigonometric Identities Teacher Resources

Find Trigonometric Identities lesson plans and worksheets
Showing 699 resources
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Instructional Video4:37
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Educator.com

Trigonometric Integrals

For Students 11th - Higher Ed
Present examples of trigonometric integrals with a video that shows an example of determining a trigonometric integral. The AP Calculus example shows that many of the trigonometric integrals require manipulation and using trigonometric...
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Instructional Video24:21
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Flipped Math

Intro to Trigonometry

For Students 9th - 12th Standards
Expand trigonometric ratios beyond right triangles. Pupils start with a review of trigonometric ratios and then take a look at angles in standard position to determine their measurements. Scholars discover how to find coterminal angles...
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Instructional Video4:38
FuseSchool

SOHCAHTOA - Finding Missing Sides Part 1

For Students 9th - 12th Standards
Explore the meaning and application of the three trigonometric ratios. A thorough video reviews the trig ratios and then shows how to apply them in triangle problems. The instructor demonstrates several examples finding both side and...
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Instructional Video
FuseSchool

Introduction to SOHCAHTOA

For Students 9th - 12th Standards
You might not be able to pronounce it, but everyone remembers SOHCAHTOA. Young mathematicians learn a way to remember the three major trigonometric ratios. They see how the first letters of certain words lead to the mnemonic. 
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Worksheet
Curated OER

Trigonometric Ratios

For Students 10th - 12th
In this trigonometric ratios activity, students determine the value of trigonometric ratios.  They find the area of triangles, determine the length of one side, and compute the degrees in an angle.  This five-page activity contains 55...
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Worksheet
Curated OER

Circular Trigonometric Functions

For Students 11th - 12th
For this Pre-calculus/Trigonometry worksheet, students prove trigonometric identities and find all values that satisfy the equations of circular trigonometric functions. The four page worksheet contains twenty-four problems. Answers are...
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Worksheet
Curated OER

Trigonometric Function

For Students 11th
In this trigonometric functions worksheet, 11th graders solve and complete 6 various types of problems. First, they express each of the expressions in trigonometric form. Then, students use DeMoivre's Theorem to express each of the...
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Instructional Video8:38
Curated OER

What are the Trigonometric Reciprocal Identities?

For Teachers 8th - 11th
By using the trigonometric ratios in a right triangle, the instructor derives definitions for cosecant, secant, and cotangent.
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Instructional Video4:50
Krista King Math

Limits of Trig Functions: Everything You Need to Know!

For Students 11th - Higher Ed
Discover how to find limits of trigonometric functions. Viewers learn a strategy to calculate limits of trigonometric functions. They see how an expression can be rewritten to one whose limits are already known.
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Instructional Video
FuseSchool

Decoding Basic Trigonometric Ratios

For Students 9th - 12th Standards
Demonstrate the calculator keystrokes necessary for finding a measure of an angle using trigonometry. A straight forward lesson explains how to calculate an angle measure given a sine, cosine, or tangent ratio. The narrator discusses...
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Instructional Video13:38
Khan Academy

Inverse Trig Functions: Arccos

For Students 10th - Higher Ed Standards
In the third video on inverse trigonometric functions, Sal follows a format similar to the last two. He finds the value for the arcos (-1/2) and shows the restricted domain of the arccos function. He also finds the value for cos(arccos...
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Instructional Video10:36
Khan Academy

Inverse Trig Functions: Arcsin

For Students 10th - Higher Ed Standards
Sal defines the concept of inverse trigonometric functions and completes two examples of arcsin. Specifically, he finds the value of the arcsin (sqroot2/2) and arcsin (sqroot3/2). He also talks about the restricted domain of arcsin...
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Instructional Video10:07
Khan Academy

Inverse Trig Functions: Arctan

For Students 10th - Higher Ed Standards
Continuing with inverse trigonometric functions, Sal finds the value for tan^-1-1. He also shows the restricted domain of the arctan function.
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Handout
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Curated OER

Trig Cheat Sheet

For Teachers 10th - 12th Standards
Your pre-calculus learners will make use of this wonderful cheat sheet that summarizes all things trigonometric. Definitions based on both the unit circle and the right triangle are included, as well as many convenient trigonometric...
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Instructional Video10:01
Curated OER

Fun Trig Problem

For Students 11th - Higher Ed
If solving trigonometric equations is your idea of fun, then this video is correctly titled. Here Sal uses trigonometric identities, the quadratic formula, and inverse trigonometric functions to solve a trigonometric equation sent in by...
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Instructional Video10:01
Curated OER

Fun Trig Problem

For Students 10th - 12th
If solving trigonometric equations is your idea of fun, then this video is correctly titled. Here Sal uses trigonometric identities, the quadratic formula, and inverse trigonometric functions to solve a trigonometric equation sent in by...
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Handout
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Curated OER

Trigonometry Review Sheet

For Students 9th - 12th Standards
Get the trig facts fast, and use the review sheet as a guide in the classroom. The worksheet also includes a document version if any changes are needed to the problems. The information includes a small degree/radian chart, a graph of all...
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Instructional Video9:56
Curated OER

Trig Identities Part 2 (Part 4 if you watch the proofs)

For Students 10th - 12th
In this video, Sal reviews the basic trigonometric definitions and identities including the sum of angles formulas and then derives the double angle formulas.
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Lesson Plan
Curated OER

Trig Transformations

For Teachers 9th - 12th Standards
Learners investigate trigonometric function.  In this Algebra II lesson, young scholars explore functional notation and transformational graphing of trigonometric functions. 
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Lesson Plan
Curated OER

Investigating Trigonometric Ratios Through Similar Right Triangles

For Teachers 9th - 10th
Students identify similar and congruent right triangles. In this geometry lesson, students use trigonometric ratios to identify missing sides and angles of a triangle. They differentiate similar and congruent triangles.
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Lesson Plan
Curated OER

Ratios in Right Triangles

For Teachers 9th - 12th Standards
Learners calculate the sides of right triangles in this trigonometric ratios lesson. They use Cabri Jr. software and TI-83 or TI-84 calculators to find the side lengths and their ratios to each other for various triangles. The provided...
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Lesson Plan
Curated OER

Exploring Trigonometric Ratios

For Teachers 9th - 10th
Students identify the ratios of trig functions. In this trigonometry lesson, students construct triangles and use it to derive the values of sine, cosine and tangent. They use Cabri software to create the visual of the identities.
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Worksheet
Curated OER

Inverse Trig Functions: Domain and Range

For Students 9th - Higher Ed
In this trigonometric functions worksheet, students calculate the domain and range of the three basic trig functions. There are 6 equations.
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Unit Plan
Mathematics Vision Project

Module 7: Trigonometric Functions, Equations, and Identities

For Students 10th - 12th Standards
Show your class that trigonometric functions have characteristics of their own. A resource explores the features of trigonometric functions. Learners then connect those concepts to inverse trigonometric functions and trigonometric...

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