Find the Point (X, Y) on the Unit Circle That $\frac { \pi } { 4 }$

Multiple Choice

Find the point (x, y) on the unit circle that corresponds to the real number $\frac { \pi } { 4 }$ .Use your results to evaluate tan t.

A) $\tan t = - \frac { \sqrt { 3 } } { 2 }$
B) $\tan t = 0$
C) $\tan t = \frac { \sqrt { 3 } } { 2 }$
D) $\tan t = 1$
E) $\tan t = \text { undefmed }$