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Let Then \int C Fdr\mathbf { F } \bullet d \mathbf { r }

Question 59

Multiple Choice

Let F(x,y) =2xyi+(x2y) j,r(t) =sinti2costj,0tπ\mathbf { F } ( x , y ) = 2 x y \mathbf { i } + ( x - 2 y ) \mathbf { j } , \mathbf { r } ( t ) = \sin t \mathbf { i } - 2 \cos t \mathbf { j } , 0 \leq t \leq \pi . Then \int C Fdr\mathbf { F } \bullet d \mathbf { r } is


A) 3π87\frac { 3 \pi - 8 } { 7 }
B) 3π+85\frac { 3 \pi + 8 } { 5 }
C) 3π85\frac { 3 \pi - 8 } { 5 }
D) 3π+83\frac { 3 \pi + 8 } { 3 }
E) 3π83\frac { 3 \pi - 8 } { 3 }

Correct Answer:

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