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

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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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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