જો $\sin x \cosh y = \cos \theta$,$\cos x \sinh y = \sin \theta$ અને $4 \tan x = 3$ હોય,તો $\sinh^2 y =$

  • A
    $\frac{4}{5}$
  • B
    $\frac{9}{16}$
  • C
    $\frac{9}{25}$
  • D
    $\frac{16}{25}$

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જો $\cos (\theta - \alpha ), \cos \theta$ અને $\cos (\theta + \alpha )$ એ $H.P.$ માં હોય, તો $\cos \theta \sec \frac{\alpha }{2}$ ની કિંમત શોધો:

$\cos \frac{\pi}{7} - \cos \frac{2\pi}{7} + \cos \frac{3\pi}{7} - \cos \frac{4\pi}{7} + \cos \frac{5\pi}{7} - \cos \frac{6\pi}{7} = $

જો $\cos x + \cos y + \cos \alpha = 0$ અને $\sin x + \sin y + \sin \alpha = 0$ હોય,તો $\cot \left( \frac{x + y}{2} \right) = $

ધારો કે $S$ એ તમામ $\alpha \in \mathbb{R}$ નો ગણ છે જેથી સમીકરણ $\cos 2x + \alpha \sin x = 2\alpha - 7$ નો ઉકેલ મળે. તો $S$ બરાબર શું થાય?

જો $\sec \theta \cosh y = \operatorname{cosec} x$ અને $\operatorname{cosec} \theta \sinh y = \sec x$ હોય,તો $\sinh ^2 y =$

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