જો ${x_n} = \cos \left( \frac{\pi }{3^n} \right) + i\sin \left( \frac{\pi }{3^n} \right)$ હોય,તો ${x_1} \cdot {x_2} \cdot {x_3} \cdots {x_\infty }$ ની કિંમત શોધો.

  • A
    $1$
  • B
    $-1$
  • C
    $i$
  • D
    $-i$

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જો $x_r = \cos(\pi/3^r) - i\sin(\pi/3^r)$ (જ્યાં $i = \sqrt{-1}$),તો $x_1 \cdot x_2 \cdot x_3 \cdots \infty$ ની કિંમત શોધો.

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