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Question #2f3f7

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Feb 13, 2017

#LHS=(cottheta-tantheta)/(sinthetacostheta)#

#=cottheta/(sinthetacostheta)-tantheta/(sinthetacostheta)#

#=costheta/(sintheta*sintheta*costheta)-sintheta/(costheta*sintheta*costheta)#

#=1/sin^2theta-1/cos^2theta#

#=csc^2theta-sec^2theta=RHS#

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