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

  • A
    $70$
  • B
    $90$
  • C
    $20$
  • D
    $30$

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सिद्ध कीजिए कि,$(\sin \alpha+\cos \alpha)(\tan \alpha+\cot \alpha)=\sec \alpha+\operatorname{cosec} \alpha$

$(\sin \theta+\cos \theta)^{2}+(\sin \theta-\cos \theta)^{2} = \dots$

$\sin 60^{\circ} \sin 45^{\circ} + \cos 60^{\circ} \cos 45^{\circ} = \ldots \ldots \ldots \ldots$

$(1+\tan ^{2} \theta)(1-\sin \theta)(1+\sin \theta)$ को सरल कीजिए।

सिद्ध कीजिए कि:
यदि $\tan A = \frac{3}{4}$ है,तो $\sin A \cos A = \frac{12}{25}$

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