જો $0 \le x \le \pi$ અને $81^{\sin^2 x} + 81^{\cos^2 x} = 30$ હોય,તો $x =$

  • A
    $\pi /6$
  • B
    $\pi /2$
  • C
    $\pi /4$
  • D
    $\pi /3$

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જો $2 \sec 2\alpha = \tan \beta + \cot \beta$ હોય,તો $\alpha + \beta$ ની એક કિંમત શું થાય?

ધારો કે $S = \{ \theta \in [0, 4\pi] : \tan^2 \theta \neq 1 \}$ અને $S = \{ a \in \mathbb{Z} : 2(\cos^8 \theta - \sin^8 \theta) \sec 2\theta = a^2, \theta \in S \}$ છે. તો $n(S)$ કેટલા થાય?

$\sqrt{3} \, \text{cosec} \, 20^\circ - \text{sec} \, 20^\circ$ ની કિંમત શું છે?

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જો $10 \sin^4 \theta + 15 \cos^4 \theta = 6$ હોય,તો $\frac{27 \operatorname{cosec}^6 \theta + 8 \sec^6 \theta}{16 \sec^8 \theta}$ ની કિંમત શોધો:

$\frac{\sqrt{3}\text{cosec } 20^{\circ}-\sec 20^{\circ}}{\cos 20^{\circ}\cos 40^{\circ}\cos 60^{\circ}\cos 80^{\circ}}$ નું મૂલ્ય કેટલું થાય?

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