prove that-
sin thita/1+cos thita + 1 + cos thita/sin thita = 2 cosec thita
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L.H.S
Sinø /(1+cosø)
= Sinø (1-cosø) / (1+ cosø)(1-cosø)
[ multiply with (1-cosø) with denominator and numerator]
= (Sinø - Sinø . Cosø) / (1 - cos^2 ø)
= (Sinø - Sinø . Cosø) / sin^2 ø [ thus, Sin^2 ø + Cos^2 ø = 1 , so ,1- cos^2 ø = sin^2 ø ]
= Sinø/ Sin ^2 ø - Sinø. Cosø / sin^2 ø
= 1/ sinø - cosø / sinø
= Cosec ø - cot ø = R.H.S (proved)
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