Find the Exact Value of the Real Number Y $$y = \sin ^ { - 1 } ( 1 )$$

Multiple Choice

Find the exact value of the real number y.
- $$y = \sin ^ { - 1 } ( 1 )$$

A) $\pi$
B) $\frac { \pi } { 3 }$
C) $\frac { \pi } { 4 }$
D) $\frac { \pi } { 2 }$