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The Improper Integral 0excosxdx\int _ { 0 } ^ { \infty } e ^ { - x } \cos x d x

Question 43

Multiple Choice

The improper integral 0excosxdx\int _ { 0 } ^ { \infty } e ^ { - x } \cos x d x is


A) - \infty
B) π4\frac { \pi } { 4 }
C) 12\frac { 1 } { 2 }
D) π\pi
E) \infty

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