$\sin 18^{\circ}$ નું મૂલ્ય શું છે?

  • A
    $\frac{4}{\sqrt{5}-1}$
  • B
    $\frac{\sqrt{5}-1}{4}$
  • C
    $\frac{\sqrt{5}+1}{4}$
  • D
    $\frac{4}{\sqrt{5}+1}$

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નીચે આપેલા અંશ માપને અનુરૂપ રેડિયન માપ શોધો: $-47^{\circ} 30^{\prime}$.

$\cos ^2\left(\frac{7 \pi}{8}\right)+\cos ^2\left(\frac{5 \pi}{8}\right)+\cos ^2\left(\frac{3 \pi}{8}\right)+\cos ^2\left(\frac{\pi}{8}\right)=$

$\frac{\cos 10^{\circ} + \cos 80^{\circ}}{\sin 80^{\circ} - \sin 10^{\circ}} = ?$

$\left(\frac{\sin 35^{\circ}}{\cos 55^{\circ}}\right)^2+\left(\frac{\cos 55^{\circ}}{\sin 35^{\circ}}\right)^2-2 \cos 30^{\circ}=$

જો $\operatorname{cosech} x = \frac{4}{5}$ હોય,તો $\cosh x =$

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