A. cos 2A = cos² A-sin² A B. cos 2A = (cos A - sin A) (cos A + sin A C. cos 2A = 2 cos² A-1 D. cos 2A 1-2 sin² A = E. cos 2A = cos² A + sin² A O C, D O B, C, D O A, B, C, D

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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Choose all the right statements.
A. cos 2A
cos² A - sin² A
B. cos 2A = (cos A - sin A) (cos A + sin A)
C. cos 2A = 2 cos² A - 1
D. cos 2A
1-2 sin² A
E. cos 2A = cos² A+ sin² A
O C, D
OB, C, D
O A, B, C, D
O A, C, E
Question 8
Transcribed Image Text:A. cos 2A cos² A - sin² A B. cos 2A = (cos A - sin A) (cos A + sin A) C. cos 2A = 2 cos² A - 1 D. cos 2A 1-2 sin² A E. cos 2A = cos² A+ sin² A O C, D OB, C, D O A, B, C, D O A, C, E Question 8
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