### Home > PC > Chapter 4 > Lesson 4.2.4 > Problem4-111

4-111.

1. Change all of the terms to sine or cosine.
2. Simplify.
3. Substitute using the Fundamental Pythagorean Identities.

1. Change all terms to sine and cosine.
2. Simplify
3. Get a common denominator.

$\frac{\text{sin}^3A+1}{\text{sin}A}$

1. Substitute using a Fundamental Pythagorean Identity.
2. Simplify.
3. Change terms to sine.

1. Factor the numerator.
2. Simplify.
3. Substitute using the Fundamental Pythagorean Identities.