यदि $3 \sin \alpha = 5 \sin \beta$ है,तो $\tan \left(\frac{\alpha + \beta}{2}\right) \div \tan \left(\frac{\alpha - \beta}{2}\right) = $

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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यदि $f(\theta) = \cos^3 \theta + \cos^3 \left(\frac{2\pi}{3} + \theta\right) + \cos^3 \left(\theta - \frac{2\pi}{3}\right)$ है,तो $f\left(\frac{\pi}{5}\right) = $

यदि किसी $x \in (\pi, \frac{3\pi}{2})$ के लिए $\cot x = \frac{5}{12}$ है, तो $\sin 7x(\cos \frac{13x}{2} + \sin \frac{13x}{2}) + \cos 7x(\cos \frac{13x}{2} - \sin \frac{13x}{2})$ का मान ज्ञात कीजिए।

$\cos ^3\left(\frac{\pi}{8}\right) \cos \left(\frac{3 \pi}{8}\right)+\sin ^3\left(\frac{\pi}{8}\right) \sin \left(\frac{3 \pi}{8}\right) = $

यदि $\sinh x = \tan A$ है,तो $|\tanh x| =$

व्यंजक $\frac{\cos 6x + 6\cos 4x + 15\cos 2x + 10}{\cos 5x + 5\cos 3x + 10\cos x}$ का मान क्या है?

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