### Home > PC > Chapter 4 > Lesson 4.3.1 > Problem 4-125

4-125.

Simplify the following trig expressions.

1. Change all terms to sine and cosine.

2. Get a common denominator.

3. Use the Fundamental Pythagorean Identity.

4. Simplify.Use the Pythagorean Identities.

Change their forms to gets.