### Home > PC > Chapter 4 > Lesson 4.2.3 > Problem 4-98

4-98.

Simplify the following trig expressions.

1. Change the

2. Simplify.

3. Substitute using the Fundamental Pythagorean Identities.

4-98.

Simplify the following trig expressions.

1. Change the

2. Simplify.

3. Substitute using the Fundamental Pythagorean Identities.