यदि $\sin ^{2}(3 x+30^{\circ})+\cos ^{2}(2 x+45^{\circ})=1$ है,तो $x = \dots$ ($^{\circ}$ में)

  • A
    $0$
  • B
    $15$
  • C
    $30$
  • D
    $60$

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सिद्ध कीजिए कि,
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यदि $\sin x = \sin 60^{\circ} \cdot \cos 30^{\circ} - \cos 60^{\circ} \cdot \sin 30^{\circ}$ है,तो $x = \ldots$ ($^{\circ}$ में)

व्यंजक $\left[\frac{\sin ^{2} 22^{\circ}+\sin ^{2} 68^{\circ}}{\cos ^{2} 22^{\circ}+\cos ^{2} 68^{\circ}}+\sin ^{2} 63^{\circ}+\cos 63^{\circ} \sin 27^{\circ}\right]$ का मान ज्ञात कीजिए।

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$\frac{\cos (90^{\circ}- A ) \sin (90^{\circ}- A )}{\tan (90^{\circ}- A )}$ का सरलीकरण ....... है।

सिद्ध कीजिए कि $\sqrt{\sec ^{2} \theta+\operatorname{cosec}^{2} \theta}=\tan \theta+\cot \theta$

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