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Double Differentiation

If y =sin x, ...

Question

If $y = sin x$ , then $\frac{d^{2} y}{d x^{2}}$ will be

A

cos x

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B

sin x

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C

- sin x

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D

2 sin x

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Solution

The correct option is C $- sin x$
$y = sin x$

$\frac{d y}{d x} = cos x$

$\frac{d^{2} y}{d x^{2}} = - sin x$

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y = sin x

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y = sin x + cos 2 x

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is equal to

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