tan+sec-1 /tan-sec+1=1+sin/cos
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Answer:
LHS=tan+sec-(sec^2-tan^2)/tan -sec+1
=tan+sec-(sec+tan)(sec+tan)/tan-sec+1
=tan+sec(1-sec+tan)/(1-sec+tan)
=tan+sec
=sin/cos+1/cos
=sin+1/cos
=1+sin/co=RHS
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