### Home > PC > Chapter 4 > Lesson 4.2.4 > Problem 4-112

4-112.

Verify the following trigonometric identities. Intermediate steps may involve complex fractions.

Substitute a Pythagorean Identity for

.

Substitute the Fundamental Pythagorean Identity into the left side of the equation for

*.*

Substitute a Pythagorean Identity for

.

Rewrite

as / .

Get common denominators and simplify.