Use the Fundamental Identities to Find the Value of the Trigonometric

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Given that $\cos \left( \theta - \frac { \pi } { 2 } \right) = - \frac { 4 } { 5 }$ , find $\sin ( - \theta )$ .

A) $- \frac { 4 } { 5 }$
B) $\frac { 4 } { 5 }$
C) $\frac { 3 } { 5 }$
D) $- \frac { 3 } { 5 }$