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If y (k) is the kth derivative of y with...

If `y _(k)` is the kth derivative of y with respect to `x,y= cos (sin x) ` then `y _(1) sin x + y_(2) cos x =`

A

`y sin^(3)x`

B

`-ysin^(3)x`

C

`y cos^(3)x`

D

`-ycos^(3)x`

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The correct Answer is:
D
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