### Home > PC > Chapter 6 > Lesson 6.3.2 > Problem 6-124

6-124.

Prove that the following trigonometric equations are true.

1. Change all terms to sine and cosine.

2. Get a common denominator for the terms in the parentheses.

3. Use the Fundamental Pythagorean Identity.

1. Multiply out on the left side.

2. Use the Fundamental Pythagorean Identity.