Find an algebraic expression equivalent to the given expression. Hint: form a right triangle. cos (2 tan -¹x) cos (2 tan ¯¹x) = (Simplify your answer. Type an exact answer, using radicals as needed. Do not rationalize the denominator.)

Trigonometry (MindTap Course List)
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ISBN:9781337278461
Author:Ron Larson
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Chapter1: Trigonometry
Section1.7: Inverse Trigonometric Functions
Problem 7ECP
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Find an algebraic expression equivalent to the given expression. Hint: form a right triangle.
cos (2 tan ¹x)
cos (2 tan ¹x) =
(Simplify your answer. Type an exact answer, using radicals as needed. Do not rationalize the denominator.)
Transcribed Image Text:Find an algebraic expression equivalent to the given expression. Hint: form a right triangle. cos (2 tan ¹x) cos (2 tan ¹x) = (Simplify your answer. Type an exact answer, using radicals as needed. Do not rationalize the denominator.)
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