Trigonometric Identities are equations involving trigonometric functions that are true for all values of the variables.

Introduction

Trigonometric Identities are equations involving trigonometric functions that are true for all values of the variables.

Lesson 1: Definitions

Trigonometric Identities are equations involving trigonometric functions that are true for all values of the variables. Examples include the Pythagorean identities.

Lesson 2: Pythagorean Identities

Trigonometric Identities are equations involving trigonometric functions that are true for all values of the variables. Examples include the Sum and Difference identities.

Lesson 3: Sum and Difference

Trigonometric Identities are equations involving trigonometric functions that are true for all values of the variables. Examples include the Double Angle identities, Calculus' favourite.

Lesson 4: Double Angle Identities