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Mathematics
Mathematics
Problem
Determine the coefficient of
x
3
x^{3}
x
3
in the Maclaurin series of
e
x
cos
x
e^{x}\cos x
e
x
cos
x
. a)
1
6
\dfrac{1}{6}
6
1
b)
−
1
6
-\dfrac{1}{6}
−
6
1
c)
−
1
3
-\dfrac{1}{3}
−
3
1
d)
1
3
\dfrac{1}{3}
3
1
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