જો $\int [ \cos(x) \cdot \frac{d}{dx}(\csc(x)) ] dx = f(x) + g(x) + c$ હોય,તો $f(x) \cdot g(x) =$

  • A
    $x \cot(x)$
  • B
    $x \tan(x)$
  • C
    $x \cos(x)$
  • D
    $1$

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$\lambda$ ની કઈ કિંમત માટે $\int \frac{4x^3 + \lambda 4^x}{4^x + x^4} \, dx = \log (4^x + x^4) + c$ થાય?

$\int \frac{1}{\sqrt{4x-x^2}} dx = $ . . . . . . $+ c$.

જો $f\left( \frac{x - 4}{x + 2} \right) = 2x + 1$ જ્યાં $x \in R \setminus \{ -2 \}$ હોય,તો $\int f(x) \,dx$ ની કિંમત શોધો (જ્યાં $C$ એ સંકલનનો અચળાંક છે).

$\int x^{2020}(\tan^{-1} x + \cot^{-1} x) dx =$

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