Prove that sina(1+tana)+cosa(1+tana)=coseca+seca
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Step-by-step explanation:
sina(1+tana)+cosa(1+cota)
=sina(cosa+sina/cosa)+cosa(sina+cosa/sina)
=(sina+cosa)(sina/cosa+cosa/sina)
=sina+cosa/sinacosa
=1/sina+1/cosa
=coseca+seca
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