જો $x \cos \theta + y \sin \theta = 5$ અને $x \sin \theta - y \cos \theta = 3$ હોય,તો $x^{2} + y^{2}$ ની કિંમત શોધો.

  • A
    $17$
  • B
    $8$
  • C
    $12$
  • D
    $34$

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સમીકરણ $\frac{1}{\sin(\frac{\pi}{n})} = \frac{1}{\sin(\frac{2\pi}{n})} + \frac{1}{\sin(\frac{3\pi}{n})}$ નું સમાધાન કરતું $n > 3$ નું ધન પૂર્ણાંક મૂલ્ય શોધો.

$\theta$ અને $\alpha$ એ $Q_3$ માં છે. જો $\cos (\theta-\alpha), \cos \theta, \cos (\theta+\alpha)$ હાર્મોનિક શ્રેણીમાં હોય,તો $\cos \theta \sec \frac{\alpha}{2} = $

$2 \sin \left(\frac{\pi}{22}\right) \sin \left(\frac{3 \pi}{22}\right) \sin \left(\frac{5 \pi}{22}\right) \sin \left(\frac{7 \pi}{22}\right) \sin \left(\frac{9 \pi}{22}\right)$ ની કિંમત શોધો.

જો $\sin 2\theta + \sin 2\phi = \frac{1}{2}$ અને $\cos 2\theta + \cos 2\phi = \frac{3}{2}$ હોય,તો $\cos^2(\theta - \phi) =$

જો $x: y: z = \tan \left(\frac{\pi}{15}+\alpha\right): \tan \left(\frac{\pi}{15}+\beta\right): \tan \left(\frac{\pi}{15}+\gamma\right)$ હોય,તો $\frac{z+x}{z-x} \sin ^2(\gamma-\alpha)+\frac{x+y}{x-y} \sin ^2(\alpha-\beta)+\frac{y+z}{y-z} \sin ^2(\beta-\gamma)$ ની કિંમત શોધો.

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