Find the exact value of cos 2a given that sin a = x=% and 1 180° < a < 270°.
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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Transcribed Image Text:Find the exact value of cos 2a given that sin a = -
180° < a < 270°.
O 7/24
O 24/25
O 7/25
O -24/7
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