If $$\cos A = \frac{1}{2}, 0 \leq A \leq 90^{\circ}$$, then what is the value of $$\sin (180 - A)?$$

A

$$\frac{1}{2}$$

B

$$\frac{\sqrt{3}}{2}$$

C

$$\frac{\sqrt{1}}{3}$$

D

$$1$$