Solve the Problem A) 3
B) -5
C) -7
D) -1

Multiple Choice

Solve the problem.
- $$\text { Evaluate } \frac { d w } { d t } \text { at } t = \frac { 1 } { 2 } \pi \text { for the function } w = x ^ { 2 } - y ^ { 2 } - 3 x ; x = \operatorname { cost } , y = \sin t$$

A) 3
B) -5
C) -7
D) -1