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if y=x^2sinx+(3x)/(tanx), then (dy)/(dx)...

if `y=x^2sinx+(3x)/(tanx)`, then `(dy)/(dx)` will be

A

`2xsinx+x^2cosx+(3tanx-3xsec^2x)/(tan^2x)`

B

`2xsinx+(3xsec^2x-3tanx)/(tan^2x)`

C

`(x^2cosx+2xsinx-(3tanx-3xsec^2x))/(tan^2x)`

D

`(x^2cosx-2xsinx-(3tanx-3xsec^2x))/(tan^2)`

Text Solution

Verified by Experts

The correct Answer is:
A

`y=x^2sinx+(3x)/(tanx)`
`(dy)/(dx)=x^2(d)/(dx)sinx+sinx(d)/(dx)(x^2)`
`+((tan)(d)/(dx)(3x)-3x(d)/(dx)(tanx))/(tan^2x)`
`(dy)/(dx)=x^2cosx+2xsinx+(3tanx-3xsec^2x)/(tan^2x)`
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