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 $\operatorname{Sinh}^{-1} x = \log 3$ અને $\operatorname{Cosh}^{-1} y = \log \frac{3}{2}$ હોય,તો $\operatorname{Tanh}^{-1}(x-y) = $

$4 \cos \frac{7 \theta}{2} \cos \frac{3 \theta}{2} \sin 5 \theta = $

$\sinh ^{-1} 2 + \sinh ^{-1} 3 = x \Rightarrow \cosh x$ ની કિંમત શોધો.

$x$ ની કઈ કિંમત માટે $\cos x > \sin x$ થાય,જ્યાં $x \in \left( \frac{\pi}{2}, \frac{3\pi}{2} \right)$?

${\sin ^4}\frac{\pi }{8} + {\sin ^4}\frac{{3\pi }}{8} + {\sin ^4}\frac{{5\pi }}{8} + {\sin ^4}\frac{{7\pi }}{8} = $

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