### Home > PC3 > Chapter 8 > Lesson 8.3.1 > Problem 8-88

8-88.

A technique similar to rationalizing the denominator can be used to rewrite some trigonometric expressions in different forms. For example, multiply numerator and denominator of *θ*) to rewrite the expression with one term in the denominator. Then rewrite the expression in terms of other trigonometric functions. Homework Help ✎

Use a Fundamental Pythagorean Identity and substitute.