જો $\tan {3^o} + 2\tan {6^o} + 4\tan {12^o} + 8\cot {24^o} = \cot {\theta ^o}$ હોય,તો:

  • A
    $\cot (10\theta)^o = 1$
  • B
    $\cot (15\theta)^o = 1$
  • C
    $\cot {\theta ^o} = 0$
  • D
    $\cot {(15\theta)^o} = \sqrt{3}$

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$\tan \frac{\pi}{5}+2 \tan \frac{2 \pi}{5}+4 \cot \frac{4 \pi}{5}$ ની કિંમત શોધો.

$\tan 81^{\circ}-\tan 63^{\circ}-\tan 27^{\circ}+\tan 9^{\circ}$ ની કિંમત શોધો.

જો $\cosh 2x = 199$ હોય,તો $\coth x$ ની કિંમત શોધો.

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