sina(1+tana)+cosa(1+cota)=seca+Coseca
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Step-by-step explanation:
sina(1+tana)+cosa(1+cota)
=sina(cosa+sina/cosa)+ cosa(sina+cosa/sina)
=(cosa+sina){sina/cosa+cosa/sina}
=(cosa+sina)(sin²a+cos²a/sinacosa)
=(cosa+sina/sinacosa)
=cosa/sinacosa+sina/sinacosa
=1/sina+1/cosa
=coseca+seca
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