1.

If y = sqrt(cos x^2 + sqrt(cos x^2 + sqrt(cos x^2 + ....oo))), then (dy)/(dx) is equal to

Answer»

`(- SIN X)/(2y - 1)`
`(-2 x sin x^2)/(2y - 1)`
`(-sin x^2)/(x(2y - 1))`
`(COS x^2)/(2y)`

Answer :B


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