$\int_{\frac{\pi}{4}}^{\frac{3 \pi}{4}} \frac{d x}{1+\cos x}$ ની કિંમત શોધો.

  • A
    $\pi-2$
  • B
    $\pi+2$
  • C
    $\frac{\pi}{4}$
  • D
    $2 \sin \frac{\pi}{2}$

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જો $\alpha = 1$ અને $\beta = 1 + i\sqrt{2}$, જ્યાં $i = \sqrt{-1}$ એ સમીકરણ $x^3 + ax^2 + bx + c = 0$ ના બે બીજ છે, જ્યાં $a, b, c \in R$, તો $\int_{-1}^{1} (x^3 + ax^2 + bx + c) dx$ ની કિંમત શોધો:

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