જો $x = 3 \sin \theta$,$y = 3 \cos \theta \cos \phi$,અને $z = 3 \cos \theta \sin \phi$ હોય,તો $x^{2} + y^{2} + z^{2} =$

  • A
    $18$
  • B
    $27$
  • C
    $9$
  • D
    $3$

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જો $\theta$ ત્રીજા ચરણમાં હોય,તો $\sqrt{4 \sin ^4 \theta+\sin ^2 2 \theta}+4 \cos ^2\left(\frac{\pi}{4}-\frac{\theta}{2}\right)=$

જો $x = \sec \phi - \tan \phi$ અને $y = \csc \phi + \cot \phi$ હોય,તો:

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

$\tan \frac{\pi}{5} + 2 \tan \frac{2 \pi}{5} + 4 \cot \frac{4 \pi}{5} = $

$\sin 20^{\circ} \cdot \sin 40^{\circ} \cdot \sin 60^{\circ} \cdot \sin 80^{\circ}$ ની કિંમત શોધો.

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