### Home > PC > Chapter 7 > Lesson 7.3.1 > Problem 7-97

7-97.

Expand each of the squared terms.

1 + 4sin*θ* + 4sin^{2}*θ* + 4cos^{2}*θ*

Factor 4 out of the squared terms.

1 + 4sin*θ* + 4(sin^{2}*θ* + cos^{2}*θ*)

Use the Fundamental Pythagorean Identity to simplify.

1 + 4sin*θ* + 4

Simplify.