જો $\frac{x}{\cos \theta} = \frac{y}{\cos \left( \theta - \frac{2\pi}{3} \right)} = \frac{z}{\cos \left( \theta + \frac{2\pi}{3} \right)},$ હોય,તો $x + y + z = $

  • A
    $1$
  • B
    $0$
  • C
    $-1$
  • D
    આમાંથી કોઈ નહીં

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