SOLUTION: What is the double angle formula derived from the sine and cosine subtraction formulas?

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Question 196607: What is the double angle formula derived from the sine and cosine subtraction formulas?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
sin2t=2sintcost
cos2t=cos^2(t) -sin^2(t)