$\sin \left(\frac{4 \pi}{3}\right)$

$\cos \left(\frac{2 \pi}{3}\right)$

$\tan \left(\frac{\pi}{3}\right)$

$\sec \left(\frac{2 \pi}{3}\right)$

$\frac{1}{32}(1+\sqrt{2}-\sqrt{3})$

$\frac{1}{16}(1+\sqrt{3}+\sqrt{5})$

$\frac{1}{16}(2+\sqrt{3}-\sqrt{5})$

$\frac{1}{32}(1+2 \sqrt{3}-\sqrt{5})$

1

$\sqrt{5}$

$\frac{1}{4}(\sqrt{5}+1)(\sqrt{10+2 \sqrt{5}})$

$\frac{1}{4}(\sqrt{5}-1)(\sqrt{10+2 \sqrt{5}})$

$4 \sqrt{3}$

$-4 \sqrt{3}$

0

1