$\sin ^2 76^{\circ}+\sin ^2 16^{\circ}-\sin 76^{\circ} \sin 16^{\circ} = $

  • A
    $0$
  • B
    $\frac{1}{4}$
  • C
    $\frac{3}{4}$
  • D
    $\frac{4}{3}$

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ધારો કે $E = \left( 1 - \frac{\cos 61^\circ}{\cos 1^\circ} \right) \left( 1 - \frac{\cos 62^\circ}{\cos 2^\circ} \right) \dots \left( 1 - \frac{\cos 119^\circ}{\cos 59^\circ} \right)$,તો $E$ ની કિંમત શોધો.

$\sin \frac{\pi}{16} \sin \frac{3 \pi}{16} \sin \frac{5 \pi}{16} \sin \frac{7 \pi}{16}$ ની કિંમત શોધો.

જો $\sin \theta + \text{cosec} \theta = 2$ હોય,તો $\sin^2 \theta + \text{cosec}^2 \theta = $

જો $A$ અને $B$ એવી કિંમતો હોય કે જેથી $(A+B)$ અને $(A-B)$ એ $\frac{\pi}{2}$ ના એકી ગુણાંક ન હોય અને $2 \tan (A+B)=3 \tan (A-B)$ હોય,તો $\sin 2A$ ની કિંમત શોધો.

જો $\sin \theta + \operatorname{cosec} \theta = 4$ હોય,તો $\sin^2 \theta + \operatorname{cosec}^2 \theta = $

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