$\sin \left(\frac{\pi}{2^{4}}\right)$ এর মান কোনটি?

$\frac{1}{2} \sqrt{2-\sqrt{2}}$

$\frac{1}{2} \sqrt{2+\sqrt{2}}$

$\frac{1}{2} \sqrt{2-\sqrt{2+\sqrt{2}}}$

$\frac{1}{2} \sqrt{2+\sqrt{2+\sqrt{2}}}$