Which of the following expressions could be used to determine the exact value of cos 300°? a 1-2sin²(150) b 2sin(150°) cos(150°) C 2cos²(300°) - 1 d cos²(300)-2sin(300°)

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
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Chapter2: Analytic Trigonometry
Section2.4: Sum And Difference Formulas
Problem 1ECP: Find the exact value of cos12.
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Which of the following expressions could be used to determine the exact value of cos
300°?
a 1-2sin²(150)
b
с
d
2sin(150°) cos(150°)
2cos²(300°) - 1
cos²(300°) - 2sin(300°)
Transcribed Image Text:Which of the following expressions could be used to determine the exact value of cos 300°? a 1-2sin²(150) b с d 2sin(150°) cos(150°) 2cos²(300°) - 1 cos²(300°) - 2sin(300°)
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