यदि $\sin(\frac{\pi}{18}) \sin(\frac{5\pi}{18}) \sin(\frac{7\pi}{18}) = K$ है, तो $\sin(\frac{10K\pi}{3})$ का मान ज्ञात कीजिए:

  • A
    $\frac{\sqrt{3}+1}{2\sqrt{2}}$
  • B
    $\frac{\sqrt{3}-1}{\sqrt{2}}$
  • C
    $\frac{\sqrt{3}}{2}$
  • D
    $\frac{1}{2}$

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यदि $630^{\circ} < \theta < 810^{\circ}$ और $\tan \theta = -\frac{7}{24}$ है,तो $\cos \left(\frac{\theta}{4}\right) = $

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यदि $\sin(x+3\alpha) + 3\sin(x-\alpha) = 0$ है,तो

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