I have a list of a bunch of addition properties Here's the problem. Thanks for your help. 2 cosē10°-1
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Originally Posted by RaphaelB30 I have a list of a bunch of addition properties Here's the problem. Thanks for your help. 2 cosē10°-1 note the double angle identity ... $\displaystyle \cos(2x) = 2\cos^2{x} - 1$
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