Can somebody help me verify this? -2cos^2xtan(-x)=sin2x
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Originally Posted by unmcintosh Can somebody help me verify this? -2cos^2xtan(-x)=sin2x knowing we multiply by cos²(x) to get and then dont forget that negative two QED
when you multiply by cos^2x, how do you get -sinxcosx?
Originally Posted by unmcintosh when you multiply by cos^2x, how do you get -sinxcosx?
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