please answer me ..................
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= 1 + cos x /sin x + sin x / 1 + cos x
= ( 1 + cos x ) 2 + sin 2 x / sin x ( 1 + cos x )
= 1 + 2 cos x + cos 2 x + sin 2 x / sin x ( 1 + cos x )
= 2 + 2 cos x / sin x ( 1+ cos x )
= 2 ( 1 + cos x ) / sin x ( 1 + cos x )
= 2 / sin x
= 2 cot x
=rhs
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