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Evaluate the Line Integral $\int _ { C } x d y$

Question 54

Multiple Choice

Evaluate the line integral $\int _ { C } x d y$ along the circle $x = \cos t , y = \sin t , 0 \leq t \leq 2 \pi$ .

A) $\frac { \pi } { 2 }$
B) $\pi$

C) $2 \pi$
D) $4 \pi$
E) $- \frac { \pi } { 2 }$
F) $- \pi$
G) $- 2 \pi$
H) $- 4 \pi$

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