જો $\int \frac{\cos ^3 x}{\sin ^2 x+\sin ^4 x} d x=c-\operatorname{cosec} x-f(x)$ હોય,તો $f\left(\frac{\pi}{2}\right)=$

  • A
    $1$
  • B
    $0$
  • C
    $\frac{\pi}{2}$
  • D
    $\pi$

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$\int (x+1)(x+3)(x+2)^7 \, dx = $ . . . . . . $+ C$.

$\int \frac{\sec x}{\sqrt{\log (\sec x+\tan x)}} d x=$

$\int \frac{x^3}{\sqrt{x^2 + 2}} \, dx = $

$\int \frac{1}{\sqrt{2x-x^2}} dx = $

જો $\int \frac{\sqrt[4]{x}}{\sqrt{x}+\sqrt[4]{x}} d x=\frac{2}{3}\left[A \sqrt[4]{x^3}+B \sqrt[4]{x^2}+C \sqrt[4]{x}+D \log (1+\sqrt[4]{x})\right]+K$ હોય,તો $\frac{2}{3}(A+B+C+D)=$

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