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Question #3cd3a

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Mar 9, 2017

#sec^2x-sec^2x/csc^2x#

#=1/cos^2x-(1/cos^2x)/(1/sin^2x)#

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

#=(1-sin^2x)/cos^2x#

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

#=cos^2x/cos^2x=1#

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