જો $2 \tan^2 \theta - 4 \sec \theta + 3 = 0$ હોય,તો $2 \sec \theta =$

  • A
    $3$
  • B
    $2 + \sqrt{2}$ અને $2 - \sqrt{2}$
  • C
    $2 - \sqrt{2}$
  • D
    $2 + \sqrt{2}$

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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) = $

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

જો $\frac{\tan (\alpha+\beta-\gamma)}{\tan (\alpha-\beta+\gamma)}=\frac{\tan \gamma}{\tan \beta}$ અને $\beta \neq \gamma$ હોય,તો $\sin 2 \alpha+\sin 2 \beta+\sin 2 \gamma$ ની કિંમત શોધો.

જો $\alpha = 22^\circ 30'$ હોય,તો $(1 + \cos \alpha )(1 + \cos 3\alpha )(1 + \cos 5\alpha )(1 + \cos 7\alpha )$ ની કિંમત શોધો.

જો $\sin^4 \alpha + 4 \cos^4 \beta + 2 = 4\sqrt{2} \sin \alpha \cos \beta$ અને $\alpha, \beta \in [0, \pi]$ હોય,તો $\cos(\alpha + \beta)$ ની કિંમત શોધો.

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