यदि $\tan x = \frac{3}{4}$ और $\pi < x < \frac{3\pi}{2}$ है,तो $\cos \frac{x}{2}$ का मान ज्ञात कीजिए।

  • A
    $\frac{3}{\sqrt{10}}$
  • B
    $-\frac{3}{\sqrt{10}}$
  • C
    $-\frac{1}{\sqrt{10}}$
  • D
    $\frac{1}{\sqrt{10}}$

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सिद्ध कीजिए कि $\sin 2x + 2 \sin 4x + \sin 6x = 4 \cos^2 x \sin 4x$.

$\tan \left(\frac{7 \pi}{8}\right)$ का मान है

यदि $\alpha = \frac{180^{\circ}}{7}$ है,तो $3 \sin \alpha - 4 \sin^{3} \alpha$ का मान क्या होगा?

$f(x) = 3 \sin x - 4 \sin^3 x$ दिया गया है,तो $f\left(\frac{\pi}{3}\right)$ का मान ज्ञात कीजिए।

$\frac{\cos A}{1 - \sin A} = $

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