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Question

If y=xsinx, then dydx=?


A

xsinxxcosxlogx+sinxx

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B

xsinxxcosxlogx+cosxx

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C

yxcosxlogx+cosxx

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D

None of these

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Solution

The correct option is A

xsinxxcosxlogx+sinxx


Finding the value of dydx:

The given differential equation is y=xsinx

y=xsinxlogy=logxsinxlogy=sinxlogxddxlogy=ddxsinxlogx1ydydx=sinxddxlogx+logxddxsinxdydx=y1xsinx+cosxlogxdydx=xsinxsinxx+cosxlogxdydx=xsinxxcosxlogx+sinxx

Hence, the correct option is (A).


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