1+cosA+sinA/1+cosA-sinA=1+sinA/cosA
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Taking L.H.S
=(1+cosA)+sinA/(1+cosA)-sinA. (1+cosA)+sinA/(1+cosA)+sinA
=[(1+cosA)²+sin²A+2sinA(1+cosA)/1+cos²A+2cosA-sin²A
=1+cos²A+2cosA+sin²A+2sin²A(1+cosA)/cos²A+cos²A+2cosA
=2+2cosA+2sinA(1+cosA)/2cos²A+2cosA
=2[1(1+cosA)+sinA(1+cosA)/2[cosA(cosA+1)]
=(1+cosA)(1+sinA)/cosA(1+cosA)
=1+sinA/cosA
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