${\left( \frac{\cos \theta + i\sin \theta}{\sin \theta + i\cos \theta} \right)^4}$ ની કિંમત શોધો.

  • A
    $\sin 8\theta - i\cos 8\theta$
  • B
    $\cos 8\theta - i\sin 8\theta$
  • C
    $\sin 8\theta + i\cos 8\theta$
  • D
    $\cos 8\theta + i\sin 8\theta$

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જો $r = 1, 2, 3, \ldots$ માટે $Z_r = \cos \left(\frac{\pi}{2^r}\right) + i \sin \left(\frac{\pi}{2^r}\right)$ હોય,તો $Z_1 Z_2 Z_3 \ldots \infty$ ની કિંમત શોધો.

જો $\alpha, \beta, \gamma, \delta$ એ સમીકરણ $x^{4}+x^{3}+x^{2}+x+1=0$ ના બીજ હોય,તો $\alpha^{2021}+\beta^{2021}+\gamma^{2021}+\delta^{2021}$ ની કિંમત શોધો.

જો ${x_r} = \cos \left( \frac{\pi }{2^r} \right) + i\sin \left( \frac{\pi }{2^r} \right)$ હોય,તો ${x_1} \cdot {x_2} \cdot {x_3} \cdots \infty$ નો ગુણાકાર શું થાય?

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જો $n$ એક પૂર્ણાંક હોય અને $Z = \cos \theta + i \sin \theta$,જ્યાં $\theta \neq (2n + 1) \frac{\pi}{2}$,તો $\frac{1 + Z^{2n}}{1 - Z^{2n}} = $

જો એકમના ઘનમૂળ $1, \omega, \omega^2$ હોય,તો સમીકરણ $(x - 2)^3 + 27 = 0$ ના બીજ શું થાય?

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