જો $\sin \theta \cosh \alpha = \tan x$ અને $\cos \theta \sinh \alpha = \sec x$ હોય,તો $\cos 2 \theta \cosh 2 \alpha$ ની કિંમત શોધો.

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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જો $x = a \cos^3 \theta$ અને $y = b \sin^3 \theta$ હોય,તો:

જો $\sec (\theta+\alpha), \sec \theta$ અને $\sec (\theta-\alpha)$ સમાંતર શ્રેણીમાં હોય,તો $\sin ^2 \theta=$

જો $f(\theta) = \cos^3 \theta + \cos^3 \left(\frac{2\pi}{3} + \theta\right) + \cos^3 \left(\theta - \frac{2\pi}{3}\right)$ હોય,તો $f\left(\frac{\pi}{5}\right) = $

$\cos \frac{2 \pi}{7}+\cos \frac{4 \pi}{7}+\cos \frac{6 \pi}{7}$

$\operatorname{sech}^2\left(\tanh ^{-1} \frac{1}{2}\right)+\operatorname{cosech}^2\left(\operatorname{coth}^{-1} 3\right)=$

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