यदि $\cos (\alpha+\beta)=0$ है,तो $\sin (\alpha-\beta)$ को किसमें बदला जा सकता है?

  • A
    $\cos 2 \beta$
  • B
    $\cos \beta$
  • C
    $\sin \alpha$
  • D
    $\sin 2 \alpha$

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यदि $\sec \theta = \frac{5}{3}$ है,तो $\tan \theta = \ldots$

सिद्ध कीजिए कि $\sin^{6} \theta + \cos^{6} \theta + 3 \sin^{2} \theta \cos^{2} \theta = 1$.

$\frac{1}{\cos ^{2} \theta}-1 = \ldots$

$\cot \theta \cdot \tan \theta = \dots$

यदि $\sin 70^{\circ} = \cos \theta$ है,तो $\theta = \ldots \ldots \ldots \ldots$ ($^{\circ}$ में)

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