The Point P(x, Y) on the Unit Circle That Corresponds $\left( \frac { \sqrt { 21 } } { 5 } , \frac { 2 } { 5 } \right) \quad$

Multiple Choice

The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated
trigonometric function at t.
- $\left( \frac { \sqrt { 21 } } { 5 } , \frac { 2 } { 5 } \right) \quad$ Find sec t.

A) $\frac { 5 \sqrt { 21 } } { 21 }$
B) $\frac { 5 } { 2 }$
C) $\frac { \sqrt { 21 } } { 2 }$
D) $\frac { 2 \sqrt { 21 } } { 21 }$