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 $a^b=$

  • A
    $4^5$
  • B
    $5^4$
  • C
    $4^4$
  • D
    $5^5$

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$\int \frac{\cos 2 x \cdot \sin 4 x}{\cos ^4 x\left(1+\cos ^2 2 x\right)} d x=$

यदि $f(x)$ का प्रति-अवकलज (antiderivative) $e^x$ है और $g(x)$ का प्रति-अवकलज $\cos x$ है, तो $\int f(x) \cos x \, dx + \int g(x) e^x \, dx =$

$\int \frac{\tan^{-1} x - \cot^{-1} x}{\tan^{-1} x + \cot^{-1} x} \, dx$ का मान ज्ञात कीजिए।

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मान लीजिए $g:(0, \infty) \rightarrow R$ एक अवकलनीय फलन है ताकि $\int \left( \frac{x(\cos x - \sin x)}{e^x + 1} + \frac{g(x)(e^x + 1 - x e^x)}{(e^x + 1)^2} \right) dx = \frac{x g(x)}{e^x + 1} + c$ सभी $x > 0$ के लिए,जहाँ $c$ एक स्वेच्छ अचर है। तो:

$\int \sqrt{1 + \csc x} \, dx$ का मान ज्ञात कीजिए।

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