Find the value of $$sin\frac{7\pi}{4}$$  $$sin\frac{\pi}{4}$$ $$sin\frac{3\pi}{4}$$ $$sin\frac{5\pi}{4}$$

A

$$\frac{1}{4}$$

B

$$\frac{3}{16}$$

C

1/8

D

$$\frac{1}{16}$$