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Question #fc29b

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Nov 26, 2016

#LHS=tanx/(secx+1)#

#=(tanx(secx-1))/((secx-1)(secx+1))#

#=(tanx(secx+1))/(sec^2x-1)#

#=(tanx(secx-1))/tan^2x#

#=(secx-1)/tanx=RHS#

Proved

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