$\int \frac{\cos 7x - \cos 8x}{1 + 2 \cos 5x} dx = $

  • A
    $\sin 2x - \frac{1}{3} \sin 3x + c$
  • B
    $\frac{1}{2} \sin 2x - \frac{1}{3} \sin 3x + c$
  • C
    $\frac{1}{2} \sin 2x - \sin 3x + c$
  • D
    $\frac{1}{3} \sin 2x - \frac{1}{2} \sin 3x + c$

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સંકલન $\int \frac{\log x - (\log x)^2 + x^2}{x^3} dx$ ની કિંમત શોધો (જ્યાં $C$ એ સંકલનનો અચળાંક છે).

$\int \frac{dx}{\tan x + \cot x + \sec x + \csc x} =$

$k \in N$ ની કઈ કિંમત માટે સંકલન $I_n = \int_0^1 (1 - x^k)^n dx, n \in N$,એ $147 I_{20} = 148 I_{21}$ નું સમાધાન કરે છે?

જો $\int \frac{dx}{2 \cos x + 3 \sin x + 4} = \frac{2}{\sqrt{3}} f(x) + c$ હોય,તો $f\left(\frac{2 \pi}{3}\right) =$

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