Find T Such That - $\frac { \pi } { 2 }$

Multiple Choice

Find t such that - $\frac { \pi } { 2 }$ ≤ t ≤ $\frac { \pi } { 2 }$ and sin t = sin $\left( \frac { 3 \pi } { 4 } \right)$ .

A) $\frac { \pi } { 2 }$
B) $\frac { \pi } { 4 }$
C) $\frac { \pi } { 6 }$
D) - $\frac { \pi } { 3 }$
E) none of these