यदि $\tan 7 \theta \cdot \tan 3 \theta = 1$ है,तो $\theta$ का मान .......... है।

  • A
    $30$
  • B
    $18$
  • C
    $15$
  • D
    $9$

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न्यूनकोण $\theta$ के लिए,यदि $\cos \theta = \sin \theta$ है,तो $2 \tan^{2} \theta + \sin^{2} \theta + 1 = \ldots$

$\operatorname{cosec} 40^{\circ} = \ldots \ldots \ldots \ldots$

$\sin^{2} 30^{\circ} - \tan 45^{\circ} + \cos^{2} 60^{\circ} - \cot 90^{\circ}$ का मान ........ है।

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

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

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