1.

Ify= (sin x )/( 1+(cos x )/(( sin x)/(1+ ....infty ))),then (dy)/(dx) =

Answer»

` ((1+y)COS X+ y SIN x)/( 1+2y +cos x -sin x )`
` ((1+y)(cos x -ysin x))/( 1+2y +cos x- SINX )`
` ((1+y)cos x +ysin x )/( 1+2y +cos x +sin x)`
` ((1+y)cos x -y sin x)/( 1+2y +cos x +sin x)`

ANSWER :A


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