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creeksider
 one year ago
Best ResponseYou've already chosen the best response.0Multiply through by tanx and you'll have something that should look familiar.

snowsurf
 one year ago
Best ResponseYou've already chosen the best response.0\[\tan^2(x) +1 = \sec^2(x)\] We will sue this identity. \[\cot(x) = \tan(x)  \sec^2(x)/\tan(x) \] \[\cot(x) = [\tan^2(x) sex^2(x)]/\tan(x) \] Use the identity above \[\cot(x)= [\tan^2(x)  (\tan^2(x)  1]/\tan(x)\] \[\cot(x) =  1/\tan(x)\] 1/tan(x) is cot(x) so cot(x) = cot(x)

snowsurf
 one year ago
Best ResponseYou've already chosen the best response.0That 1 should be positive then become negative when distributing the negative sign.
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