Suppose That $\theta$ Is in Standard Position and the Given Point Is on Point

Multiple Choice

Suppose that $\theta$ is in standard position and the given point is on the terminal side of $\theta$ . Give the exact value of the indicated trig function for $\theta$ . Rationalize the denominator if necessary. If the function is undefined, say so.
- $( 9,12 )$ ; find $\cos \theta$ .

A) $\frac { 3 } { 5 }$
B) $\frac { 3 } { 4 }$
C) $\frac { 4 } { 3 }$
D) $\frac { 4 } { 5 }$