$\int \frac{1}{\cos x} \left[ \frac{1}{\sin x} - \frac{1}{\sin x + 3 \cos x} \right] dx =$

  • A
    $\frac{1}{3} \log \left| \frac{\sin x}{\sin x + 3 \cos x} \right| + c$
  • B
    $\log \left| \frac{\cos x}{\sin x + 3 \cos x} \right| + c$
  • C
    $\frac{1}{3} \log \left| \frac{\cos x}{\sin x + 3 \cos x} \right| + c$
  • D
    $\log \left| \frac{\sin x}{\sin x + 3 \cos x} \right| + c$

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यदि $\int \frac{dx}{(x+1)(x-2)(x-3)}=\frac{1}{k} \log_e \left\{ \frac{|x-3|^3|x+1|}{(x-2)^4} \right\}+c$ है, तो $k$ का मान ज्ञात कीजिए।

$\int \frac{d x}{(\sin x+\cos x)(2 \cos x+\sin x)} = $

$\int \frac{x}{(x-1)(x-2)} dx = $ . . . . . . $+ C$.

$\int \frac{dx}{(x+1)(x+2)}$ का मान क्या है?

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