ધારો કે $\frac{\pi}{2} < \theta < \pi$ અને $\cot \theta = -\frac{1}{2 \sqrt{2}}$. તો $\sin (\frac{15 \theta}{2}) (\cos 8 \theta + \sin 8 \theta) + \cos (\frac{15 \theta}{2}) (\cos 8 \theta - \sin 8 \theta)$ ની કિંમત શોધો:

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

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