Suppose $-\frac{\pi}{2}<\theta<0$ And $\cos (\theta)=\frac{15}{16}$ Evaluate:
A) Sin

Suppose $-\frac{\pi}{2}<\theta<0$ and $\cos (\theta)=\frac{15}{16}$ . Evaluate:
A) sin( $\theta$ )
B) tan( $\theta$ )
Give the exact answers.