જો $f^{\prime}(x)=k(\cos x-\sin x)$,$f^{\prime}(0)=3$,અને $f\left(\frac{\pi}{2}\right)=15$ હોય,તો $f(x)=$

  • A
    $3(\sin x+\cos x)+12$
  • B
    $3(\sin x+\cos x)-12$
  • C
    $-3(\sin x+\cos x)-12$
  • D
    $12(\sin x+\cos x)+3$

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$\frac{d}{dx}(e^{x\sin x}) = $

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જો $y = \frac{ax+b}{cx+d}$ અને $\frac{dx}{dy} = \frac{ad-bc}{Py^2+Qy+R}$ હોય,તો $P+Q+R =$

$\frac{d}{dx}\left[ \frac{2}{\pi }\sin {x^\circ} \right] = $

નીચેનામાંથી કયું ખોટું છે?

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