જો $\sum_{r=1}^{13} \left\{ \frac{1}{\sin \left(\frac{\pi}{4} + (r-1) \frac{\pi}{6}\right) \sin \left(\frac{\pi}{4} + \frac{r\pi}{6}\right)} \right\} = a\sqrt{3} + b$,જ્યાં $a, b \in \mathbb{Z}$,તો $a^2 + b^2$ ની કિંમત શોધો:

  • A
    $10$
  • B
    $2$
  • C
    $8$
  • D
    $4$

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Similar Questions

કિંમત શોધો: $\sqrt{3} \operatorname{cosec} 20^{\circ} - \sec 20^{\circ}$

કોઈપણ $\theta \in \left( \frac{\pi}{4}, \frac{\pi}{2} \right)$ માટે,પદાવલિ $3(\sin \theta - \cos \theta)^4 + 6(\sin \theta + \cos \theta)^2 + 4\sin^6 \theta$ ની કિંમત શોધો.

જો $\cot \theta + \tan \theta = 3$ અને $1 - \cos^2 \theta - \alpha \cos \theta = 0$ હોય,તો

કિંમત શોધો: $\sin 6^{\circ} + \sin 54^{\circ} + \sin 126^{\circ} + \cos 156^{\circ}$

જો $\sec \theta + \tan \theta = \frac{1}{3}$ હોય,તો $2 \theta$ કયા ચરણમાં આવે છે?

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