SAT Lines, angles, and triangles Question

In the $xy$ -plane, a unit circle with center at the origin $O$ contains point $A$ with coordinates $(1,0)$ and point $B$ with coordinates $\left(\frac{5}{\sqrt{34}},-\frac{3}{\sqrt{34}}\right)$ . If the measure of angle $AOB$ is $p$ radians, what is the value of $\frac{\cos p}{\sin p}$ ?