If y= A sin x+ B cos x, then prove that ...

If `y= A sin x+ B cos x`, then prove that `(d^(2)y)/(dx^(2))+y=0`.

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The correct Answer is:

`(d^(2)y)/(dx^(2))+y=0`.

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यदि y=A cos x + B sin x है तो सिद्ध कीजिए कि (d^2y)/(dx^2)+y=0 होगा ।
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