જો $x \sin^3 \alpha + y \cos^3 \alpha = \sin \alpha \cos \alpha$ અને $x \sin \alpha - y \cos \alpha = 0$ હોય,તો $x^2 + y^2 = $

  • A
    $-1$
  • B
    $1$
  • C
    $0$
  • D
    આમાંથી કોઈ નહીં

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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.

જો $\theta \in \left(\frac{\pi}{2}, \frac{3 \pi}{2}\right)$ હોય,તો $\sqrt{4 \cos^{4} \theta + \sin^{2} 2 \theta} + 4 \cot \theta \cos^{2} \left(\frac{\pi}{4} - \frac{\theta}{2}\right)$ ની કિંમત શોધો.

જો $\tan \theta + \cot \theta = 4$ હોય,તો $\tan^{4} \theta + \cot^{4} \theta = $

$\cos 20^{\circ} \cos 40^{\circ} \cos 60^{\circ} \cos 80^{\circ} = $

જો $\theta$ એ લઘુકોણ હોય,$\cosh x = K$ અને $\sinh x = \tan \theta$ હોય,તો $\sin \theta =$

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