$\tan \left( \frac{\pi }{4} + \theta \right) - \tan \left( \frac{\pi }{4} - \theta \right) = $

  • A
    $2\tan 2\theta $
  • B
    $2\cot 2\theta $
  • C
    $\tan 2\theta $
  • D
    $\cot 2\theta $

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यदि $\cos ^{2} \theta-\sin ^{2} \theta=\frac{1}{3},$ जहाँ $0 \leq \theta \leq \frac{\pi}{2}$ है,तो $\cos ^{4} \theta-\sin ^{4} \theta$ का मान क्या है?

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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।

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यदि $\cos (\alpha + \beta ) = \frac{4}{5}, \sin (\alpha - \beta ) = \frac{5}{13}$ और $\alpha, \beta$ का मान $0$ और $\frac{\pi}{4}$ के बीच है,तो $\tan 2\alpha = $

यदि $\cos A = \frac{3}{4}$ है,तो $32\sin \left( \frac{A}{2} \right)\sin \left( \frac{5A}{2} \right) = $

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