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Question #56c6f

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Feb 21, 2017

#tan2x-cot2x#

#=(sin2x)/(cos2x)-(cos2x)/(sin2x)#

#=(sin^2 2x-cos^2 2x)/(sin2xcos2x)#

#=-(2(cos^2 2x-sin^2 2x))/(2*sin2xcos2x)#

#=-(2cos4x)/(sin4x)#

#=-cot4x#

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