Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.8 cos2 x
A. 16 cos x
B. 1 + cos 2x
C. 4 - 4 cos 2x
D. 4 + 4 cos 2x
Answer: D
Mathematics
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A. 
B. 
C. 
D. 
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= 8
A. {-2, 2} B. {2, 6} C. {-2, 2, 6} D. {-2, 2, -6}
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