Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 89E
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Question
![28. Which of the following is an identity? A. cos 4x = 4 cos x
2 sin 2x cos 2x D. tan 3x = 3 tan x.
B. sin(x + y):
= sin x + sin y
C. sin 4x =](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F34672991-aec6-46ee-ad36-157c83d795dd%2Fcc8c4a9e-7ea0-4223-bd9c-832bc7c1be4c%2F7lx81i_processed.png&w=3840&q=75)
Transcribed Image Text:28. Which of the following is an identity? A. cos 4x = 4 cos x
2 sin 2x cos 2x D. tan 3x = 3 tan x.
B. sin(x + y):
= sin x + sin y
C. sin 4x =
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