यदि $\int \frac{1}{a^2 \sin^2 x + b^2 \cos^2 x} dx = \frac{1}{12} \tan^{-1}(3 \tan x) + C$ है,तो $a \sin x + b \cos x$ का अधिकतम मान ज्ञात कीजिए:

  • A
    $\sqrt{40}$
  • B
    $\sqrt{39}$
  • C
    $\sqrt{42}$
  • D
    $\sqrt{41}$

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यदि $\int \frac{\cos (13 x)-\cos (14 x)}{1+2 \cos (9 x)} d x=\frac{\sin (4 x)}{a}-\frac{\sin (5 x)}{b}+c$ है,तो $a^b=$

$\int e^{2 x}\left[\cos (3 x+4)+5 x^2\right] d x=$

$\int \frac{x+\sin x}{1+\cos x} d x=$

मान लीजिए $5 f(x)+4 f\left(\frac{1}{x}\right)=\frac{1}{x}+3$,जहाँ $x > 0$ है। तो $18 \int \limits_1^2 f(x) \, dx$ का मान ज्ञात कीजिए:

$\int (1+\tan^2 x)(1+2x \tan x) dx =$

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