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Home > PC3 > Chapter 8 > Lesson 8.3.1 > Problem 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 by to rewrite the expression with one term in the denominator. Then rewrite the expression in terms of other trigonometric functions.

Use a Fundamental Pythagorean Identity and substitute.