SOLUTION: Which expression is NOT equivalent to cos2θ ? a. cos� θ -sin� θ b. 2cos� θ -1 c. 1-2sin� θ d. 2sinθ cosθ Is it D?

SOLUTION: Which expression is NOT equivalent to cos2θ ? a. cos� θ -sin� θ b. 2cos� θ -1 c. 1-2sin� θ d. 2sinθ cosθ Is it D?

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Question 198570: Which expression is NOT equivalent to cos2θ ?
a. cos� θ -sin� θ
b. 2cos� θ -1
c. 1-2sin� θ
d. 2sinθ cosθ
Is it D?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You are correct. The answer is D. The expression

is equal to

(ie

)
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