$(1-\cos \theta)(1+\cos \theta) = \dots$

  • A
    $\operatorname{cosec}^{2} \theta$
  • B
    $\cos ^{2} \theta$
  • C
    $2-\cos ^{2} \theta$
  • D
    $\sin ^{2} \theta$

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પદાવલિ $\left[\frac{\sin ^{2} 22^{\circ}+\sin ^{2} 68^{\circ}}{\cos ^{2} 22^{\circ}+\cos ^{2} 68^{\circ}}+\sin ^{2} 63^{\circ}+\cos 63^{\circ} \sin 27^{\circ}\right]$ ની કિંમત શોધો.

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$\Delta ABC$ માં, $AC = 5$, $BC = 13$, $m \angle A = 90^\circ$ હોય, તો $\tan B = \ldots$

જો $A+B+C=180^{\circ}$ હોય,તો $\tan \left(\frac{A+B}{2}\right)=$ ...........

$\sin 48^{\circ} \sec 42^{\circ} + \cos 48^{\circ} \operatorname{cosec} 42^{\circ} = \ldots \ldots \ldots \ldots$

$\tan ^{2} \theta - \sec ^{2} \theta = \ldots \ldots \ldots$

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