Sine, Cosine, and Tangent Practice Test

As an angle $$\theta$$ increases from $$\pi$$ to $$\frac{3\pi}{2}$$, what is the behavior of $$\sin\theta$$ and $$\cos\theta$$?

A circle is centered at the origin and has a radius of 4. The terminal ray of an angle $$\theta$$ intersects the circle at a point P in Quadrant III with a y-coordinate of $$-2$$. What is the value of $$\cos\theta$$?