cosa/1+sina+1+sina/cosa=2seca
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explanation:
cosa/1+sina +1+sina/cosa
= cos2a +1 +sin2a+ 2sina/ cosa+sina.cosa
=2 + 2sina/ cosa +sina.cosa .............. as sin2a +cos2a =1
= 2( 1+ sina)/ cosa(1+ sina)
= 2/cosa ...................... 1+sina gets cancelled
= 2seca
^-^
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