SOLUTION: Complete the following Identity cos 2x =

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Question 207519: Complete the following Identity
cos 2x =
Found 2 solutions by HyperBrain, rfadrogane:
Answer by HyperBrain(694) About Me  (Show Source):
Answer by rfadrogane(214) About Me  (Show Source):
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cos 2x = 1 – 2 sin^2x
cos 2x = 2 cos^2x – 1