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

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