સંકલન $\int \frac{x^2 + \cos^2 x}{1 + x^2} \operatorname{cosec}^2 x \, dx$ ની કિંમત શોધો,જ્યાં $c$ એ સંકલનનો અચળાંક છે.

  • A
    $-\tan^{-1} x - \cot x + c$
  • B
    $c - \cot x + \cot^{-1} x$
  • C
    $-\tan^{-1} x - \cot x + c$
  • D
    $\tan^{-1} x - \cot x + c$

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વિધેયનું સંકલન કરો: $\frac{5 x-2}{1+2 x+3 x^{2}}$

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