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.
-Find $\sin \theta$ , given that $\cos \theta = \frac { 2 } { 3 }$ and $\tan \theta < 0$

A) $- \frac { \sqrt { 5 } } { 2 }$
B) $- \sqrt { 5 }$
C) $- \frac { \sqrt { 5 } } { 3 }$
D) $- \frac { 3 } { 2 }$