What should be the first step in verifying the following identity? (Hint - look at the numerator) sin 42 – 4 sin cos a cos 2a Rewrite cos 2x as 1 – 2 sin? z Rewrite sin 4x as 2 sin(2x) cos(2r) Rewrite cos 2x as cos² x – sin? x sin 2x Reduce the 4x and 2x to become Cos E
What should be the first step in verifying the following identity? (Hint - look at the numerator) sin 42 – 4 sin cos a cos 2a Rewrite cos 2x as 1 – 2 sin? z Rewrite sin 4x as 2 sin(2x) cos(2r) Rewrite cos 2x as cos² x – sin? x sin 2x Reduce the 4x and 2x to become Cos E
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 72E
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