જો $\cot 3A = x$ હોય,તો $x$ ની કિંમત શું થાય?

  • A
    $\frac{3 \cot A + \cot^3 A}{1 + 3 \cot^2 A}$
  • B
    $\frac{3 \cot A - \cot^3 A}{1 + 3 \cot^2 A}$
  • C
    $\frac{3 \cot A + \cot^3 A}{1 - 3 \cot^2 A}$
  • D
    $\frac{3 \cot A - \cot^3 A}{1 - 3 \cot^2 A}$

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