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.
- $( - 5 , \sqrt { 3 } )$ ; find $\sec \theta$

A) $- \frac { \sqrt { 3 } } { 5 }$
B) $- \frac { 5 \sqrt { 3 } } { 3 }$
C) $- \frac { 2 \sqrt { 7 } } { 5 }$
D) $- \frac { 2 \sqrt { 7 } } { 3 }$