sin 4A = cos (A - 20°), where 4A is an acute angle, find the value of A. (A) 22° (B) 25° (C) 35° (D) 60°

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 21E
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sin 4A = cos (A - 20°), where 4A is an acute angle, find the value of A.
(A) 22°
(B) 25°
(C) 35°
(D) 60°
Transcribed Image Text:sin 4A = cos (A - 20°), where 4A is an acute angle, find the value of A. (A) 22° (B) 25° (C) 35° (D) 60°
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