यदि $\tan \theta = \frac{1}{\sqrt{11}}$ और $0 < \theta < \frac{\pi}{2}$ है,तो $\frac{\operatorname{cosec}^{2} \theta - \sec ^{2} \theta}{\operatorname{cosec}^{2} \theta + \sec ^{2} \theta}$ का मान ज्ञात कीजिए।

  • A
    $\frac{3}{4}$
  • B
    $\frac{4}{5}$
  • C
    $\frac{5}{6}$
  • D
    $\frac{6}{7}$

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यदि $\tan 80^{\circ} = a$ और $\tan 47^{\circ} = b$ है,तो $\tan 37^{\circ}$ का मान क्या होगा?

यदि $A + B + C = \pi$ है,तो $\tan^2 \frac{A}{2} + \tan^2 \frac{B}{2} + \tan^2 \frac{C}{2}$ हमेशा क्या होगा?

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