यदि $\tan \theta = \frac{5}{12}$ है,तो $\cos \theta = \ldots$

  • A
    $\frac{5}{13}$
  • B
    $\frac{5}{6}$
  • C
    $\frac{12}{13}$
  • D
    $\frac{12}{5}$

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यदि $\cot \theta = \frac{a}{b}$ है,तो $\frac{\cos \theta - \sin \theta}{\cos \theta + \sin \theta} = \ldots$

$\frac{1}{\cos ^{2} \theta}-1 = \ldots$

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

$\sin 48^{\circ} \sec 42^{\circ} + \cos 48^{\circ} \operatorname{cosec} 42^{\circ} = \ldots \ldots \ldots \ldots$

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

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