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

  • A
    $0$
  • B
    $45$
  • C
    $60$
  • D
    $90$

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यदि $1+\sin ^{2} \theta=3 \sin \theta \cos \theta$ है,तो सिद्ध कीजिए कि $\tan \theta=1$ या $\frac{1}{2}$ है।

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यदि $3 \cot \theta = 4$ है,तो $\frac{1 - \tan^2 \theta}{1 + \tan^2 \theta} = \dots$ ज्ञात कीजिए।

सिद्ध कीजिए कि $\frac{\cos ^{2}\left(45^{\circ}+\theta\right)+\cos ^{2}\left(45^{\circ}-\theta\right)}{\tan \left(60^{\circ}+\theta\right) \tan \left(30^{\circ}-\theta\right)}=1$

$\cos (40^{\circ}-\theta)-\sin (50^{\circ}+\theta) = \ldots \ldots \ldots \ldots$

$\cos 35^{\circ} = \ldots \ldots \ldots$

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