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Mathematics
Problem
d
d
x
[
e
a
x
cos
(
b
x
+
c
)
]
=
\frac{d}{dx}[e^{ax} \cos(bx + c)] =
d
x
d
[
e
a
x
cos
(
b
x
+
c
)]
=
(a)
e
a
x
[
a
cos
(
b
x
+
c
)
−
b
sin
(
b
x
+
c
)
]
e^{ax}[a \cos(bx + c) - b \sin(bx + c)]
e
a
x
[
a
cos
(
b
x
+
c
)
−
b
sin
(
b
x
+
c
)]
(b)
e
a
x
[
a
sin
(
b
x
+
c
)
−
b
cos
(
b
x
+
c
)
]
e^{ax}[a \sin(bx + c) - b \cos(bx + c)]
e
a
x
[
a
sin
(
b
x
+
c
)
−
b
cos
(
b
x
+
c
)]
(c)
e
a
x
[
cos
(
b
x
+
c
)
−
sin
(
b
x
+
c
)
]
e^{ax}[\cos(bx + c) - \sin(bx + c)]
e
a
x
[
cos
(
b
x
+
c
)
−
sin
(
b
x
+
c
)]
(d) None of these
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