Let $x ( t ) = 4 \cos t , y ( t ) = 3 \sin t$

Multiple Choice

Let $x ( t ) = 4 \cos t , y ( t ) = 3 \sin t$ be the parametric equations of a curve. Then $\frac { d y } { d x }$ is

A) $- \frac { 3 \cot t } { 4 }$
B) $\frac { 3 \cot t } { 4 }$
C) $- \frac { 3 \tan t } { 4 }$
D) $\frac { 3 \tan t } { 4 }$
E) $- \frac { 4 \cot t } { 3 }$