Use Implicit Differentiation to Find the Specified Derivative at the Given

Multiple Choice

Use implicit differentiation to find the specified derivative at the given point.
-Find $\frac { d y } { d x }$ at the point $( 1,0 )$ for $\cos x y + y e ^ { x } = 0$ .

A) $\mathrm { e }$
B) 0
C) 1
D) $\frac { 1 } { \mathrm { e } }$