यदि $f^{\prime}(x)=a \sin x+b \cos x$,$f^{\prime}(0)=4$,$f(0)=3$ और $f\left(\frac{\pi}{2}\right)=5$ है,तो $f(x)=$

  • A
    $-2 \cos x-4 \sin x+1$
  • B
    $2 \cos x+4 \sin x+1$
  • C
    $2 \sin x-4 \cos x+1$
  • D
    $2 \sin x+4 \cos x+1$

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यदि $\int \frac{dx}{x^2+2x+2}=f(x)+c$ है,तो $f(x)$ किसके बराबर है?

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यदि $\int (\sin 2x - \cos 2x) \,dx = \frac{1}{\sqrt{2}} \sin(2x - a) + b$ है,तो

$\int \frac{\cos 2x - \cos 2\alpha}{\cos x - \cos \alpha} dx =$

निम्नलिखित कथनों $(A)$ और $(B)$ पर विचार करें:
$(A) \int_a^b \frac{d}{d x}(f(x)) d x = \frac{d}{d x} \int_a^b f(x) d x$
$(B) \frac{d}{d x} \left( \int f(x) d x \right) = f(x) + C$
निम्नलिखित में से कौन सा सत्य है?

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