न्यूनकोण $A$ और $B$ के लिए,यदि $\tan A = 1$ और $\sin B = \frac{1}{\sqrt{2}}$ है,तो $\cos (A + B) = \dots$

  • A
    $0$
  • B
    $1$
  • C
    $\sqrt{2}$
  • D
    $\frac{1}{\sqrt{2}}$

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$\sec (90^\circ - \theta) = \dots$

यदि $5 \cos A = 4 \sin A$,तो $\tan A = \ldots$

सिद्ध कीजिए कि $\frac{1+\sec \theta-\tan \theta}{1+\sec \theta+\tan \theta}=\frac{1-\sin \theta}{\cos \theta}$

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यदि $\sin ^{2} 35^{\circ} + \cos ^{2} \theta = 1$ है,तो $\theta = \ldots \ldots \ldots \ldots$ ($^{\circ}$ में)

$\sin (90^\circ - \theta) = \ldots \ldots \ldots$

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