# Trigonometric Identities Teacher Resources

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#### Trigonometric Integrals

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...

Flipped Math

#### Intro to Trigonometry

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...

FuseSchool

#### SOHCAHTOA - Finding Missing Sides Part 1

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...

FuseSchool

#### Introduction to SOHCAHTOA

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.

Curated OER

#### Trigonometric Ratios

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...

Curated OER

#### Circular Trigonometric Functions

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...

Curated OER

#### Trigonometric Function

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...

Curated OER

#### What are the Trigonometric Reciprocal Identities?

By using the trigonometric ratios in a right triangle, the instructor derives definitions for cosecant, secant, and cotangent.

Krista King Math

#### Limits of Trig Functions: Everything You Need to Know!

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.

FuseSchool

#### Decoding Basic Trigonometric Ratios

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...

Khan Academy

#### Inverse Trig Functions: Arccos

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...

Khan Academy

#### Inverse Trig Functions: Arcsin

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...

Khan Academy

#### Inverse Trig Functions: Arctan

Continuing with inverse trigonometric functions, Sal finds the value for tan^-1-1. He also shows the restricted domain of the arctan function.

Curated OER

#### Trig Cheat Sheet

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...

Curated OER

#### Fun Trig Problem

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...

Curated OER

#### Fun Trig Problem

Curated OER

#### Trigonometry Review Sheet

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...

Curated OER

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

In this video, Sal reviews the basic trigonometric definitions and identities including the sum of angles formulas and then derives the double angle formulas.

Curated OER

#### Trig Transformations

Learners investigate trigonometric function. In this Algebra II lesson, young scholars explore functional notation and transformational graphing of trigonometric functions.

Curated OER

#### Investigating Trigonometric Ratios Through Similar Right Triangles

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.

Curated OER

#### Ratios in Right Triangles

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...

Curated OER

#### Exploring Trigonometric Ratios

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.

Curated OER

#### Inverse Trig Functions: Domain and Range

In this trigonometric functions worksheet, students calculate the domain and range of the three basic trig functions. There are 6 equations.

Mathematics Vision Project

#### Module 7: Trigonometric Functions, Equations, and Identities

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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