यदि $\sin \theta = \frac{1}{2}$ है,तो $\theta = \ldots \ldots \ldots \ldots$ ($^\circ$ में)

  • A
    $30$
  • B
    $45$
  • C
    $60$
  • D
    $90$

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

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यदि $\sec 4A = \operatorname{cosec}(A - 20^\circ)$ है,जहाँ $4A$ एक न्यून कोण है,तो $A$ का मान $\ldots \ldots \ldots \ldots$ है। ($^\circ$ में)

यदि $\sin \theta - \cos \theta = 0$ है,तो $(\sin^4 \theta + \cos^4 \theta)$ का मान क्या होगा?

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