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Calculus Examples
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Calculus
Find the Derivative - d/dx 2cos(x)
2
cos
(
x
)
2
cos
(
x
)
Step 1
Since
2
2
is
constant
with respect to
x
x
, the
derivative
of
2
cos
(
x
)
2
cos
(
x
)
with respect to
x
x
is
2
d
d
x
[
cos
(
x
)
]
2
d
d
x
[
cos
(
x
)
]
.
2
d
d
x
[
cos
(
x
)
]
2
d
d
x
[
cos
(
x
)
]
Step 2
The
derivative
of
cos
(
x
)
cos
(
x
)
with respect to
x
x
is
−
sin
(
x
)
-
sin
(
x
)
.
2
(
−
sin
(
x
)
)
2
(
-
sin
(
x
)
)
Step 3
Multiply
−
1
-
1
by
2
2
.
−
2
sin
(
x
)
-
2
sin
(
x
)
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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