Learn Without Walls
← Back to Trigonometry Course

Module 5: Trigonometric Identities

Master verification strategies and learn sum/difference, double-angle, half-angle, and product-to-sum formulas.

4 Lessons
~4 hours
10 Practice Problems
Module Quiz

Learning Objectives

  • Verify trig identities using algebraic manipulation strategies
  • Apply sum and difference formulas for sine, cosine, and tangent
  • Use double-angle and half-angle formulas
  • Convert between products and sums of trig functions

Module Lessons

1

Strategies for Verifying Trig Identities

Learn systematic approaches for proving trig identities.

2

Sum and Difference Formulas

sin(A±B), cos(A±B), tan(A±B) formulas and applications.

3

Double-Angle and Half-Angle Formulas

Derive and apply formulas for sin 2θ, cos 2θ, and half-angle expressions.

4

Product-to-Sum and Sum-to-Product Formulas

Convert between products and sums of trig functions.

After the Lessons

Practice

Practice

Quiz

Quiz

Study Materials

Begin Module 5 →