SOLUTION: Can I please have your assistance? Verify the following identity by using an angle sum identify: cos(2x) = 1 - 2(sin2 x). Hint (2x = x + x )

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Question 1042547: Can I please have your assistance? Verify the following identity by using an angle sum identify: cos(2x) = 1 - 2(sin2 x). Hint (2x = x + x )
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
cos%282x%29=cos%28x%2Bx%29

Use the formula for angle sum for cosine, cos%28a%2Bb%29=cos%28a%29cos%28b%29-sin%28a%29sin%28b%29. You take it from here.