 ## NY-AII-F.TF.8: Prove the Pythagorean identity sin2(θ) + cos2(θ) = 1. Find the value of any of the six trigonometric functions given any other trigonometric function value and when necessary find the quadrant of the angle.

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Title Description Thumbnail Image Curriculum Topics

## Closed Captioned Video: Trig Identities

Closed Captioned Video: Trig Identities

In this TI Nspire tutorial for the TI-Nspire CAS, the Calculator window is used to find the trigonometric identities for addition and subtraction of sine and cosine. This video supports the TI-Nspire Clickpad and Touchpad. This Mini-Tutorial Video includes a worksheet. . Trig Expressions and Identities

## Definition--Geometry Basics--Pythagorean Identity 1

Definition--Geometry Basics--Pythagorean Identity 1

This collection of clip art images includes image sequences for key topics in geometry. This includes points, lines, planes, angles, triangles, quadrilaterals, and polygons. Each sequence of images provides an overview of the topic. Trig Expressions and Identities

## Definition--Geometry Basics--Pythagorean Identity 2

Definition--Geometry Basics--Pythagorean Identity 2

This collection of clip art images includes image sequences for key topics in geometry. This includes points, lines, planes, angles, triangles, quadrilaterals, and polygons. Each sequence of images provides an overview of the topic. Trig Expressions and Identities

## Definition--Geometry Basics--Pythagorean Identity 3

Definition--Geometry Basics--Pythagorean Identity 3

This collection of clip art images includes image sequences for key topics in geometry. This includes points, lines, planes, angles, triangles, quadrilaterals, and polygons. Each sequence of images provides an overview of the topic. Trig Expressions and Identities

## Definition--Geometry Basics--Pythagorean Theorem

Definition--Geometry Basics--Pythagorean Theorem

This collection of clip art images includes image sequences for key topics in geometry. This includes points, lines, planes, angles, triangles, quadrilaterals, and polygons. Each sequence of images provides an overview of the topic. Right Triangles

## Definition--Trig Concepts--Cosine Difference Identity

Definition--Trig Concepts--Cosine Difference Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Cosine Ratio

Definition--Trig Concepts--Cosine Ratio

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Cosine Sum Identity

Definition--Trig Concepts--Cosine Sum Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Cotangent Ratio

Definition--Trig Concepts--Cotangent Ratio

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Law of Cosines

Definition--Trig Concepts--Law of Cosines

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Law of Sines

Definition--Trig Concepts--Law of Sines

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Secant Ratio

Definition--Trig Concepts--Secant Ratio

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Sine Difference Identity

Definition--Trig Concepts--Sine Difference Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Sine Ratio

Definition--Trig Concepts--Sine Ratio

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Sine Sum Identity

Definition--Trig Concepts--Sine Sum Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Tangent Difference Identity

Definition--Trig Concepts--Tangent Difference Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Tangent Ratio

Definition--Trig Concepts--Tangent Ratio

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Tangent Sum Identity

Definition--Trig Concepts--Tangent Sum Identity

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## Definition--Trig Concepts--Trig Ratios

Definition--Trig Concepts--Trig Ratios

This is part of a collection of terms and definitions related to trigonometry concepts. Trig Expressions and Identities

## INSTRUCTIONAL RESOURCE: Tutorial: What Is an Identity?

INSTRUCTIONAL RESOURCE: Tutorial: What Is an Identity?

An identity is a special type of equation. It includes at least one variable and an identity is true for all values of the variable. Note: The download is a PDF. Applications of Equations and Inequalities

## Math Example--Trig Concepts--Working with Trig Identities--Example 1

Math Example--Trig Concepts--Working with Trig Identities--Example 1

This is part of a collection of math examples that focus on Trig concepts. Trig Expressions and Identities

## Math Example--Trig Concepts--Working with Trig Identities--Example 2

Math Example--Trig Concepts--Working with Trig Identities--Example 2

This is part of a collection of math examples that focus on Trig concepts. Trig Expressions and Identities

## Math Example--Trig Concepts--Working with Trig Identities--Example 3

Math Example--Trig Concepts--Working with Trig Identities--Example 3

This is part of a collection of math examples that focus on Trig concepts. Trig Expressions and Identities

## Math Example--Trig Concepts--Working with Trig Identities--Example 4

Math Example--Trig Concepts--Working with Trig Identities--Example 4

This is part of a collection of math examples that focus on Trig concepts. Trig Expressions and Identities

## Math Example--Trig Concepts--Working with Trig Identities--Example 5

Math Example--Trig Concepts--Working with Trig Identities--Example 5

This is part of a collection of math examples that focus on Trig concepts. Trig Expressions and Identities