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Precalculus Examples
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Precalculus
Factor cos(2x)cos(x)-sin(2x)sin(x)
cos
(
2
x
)
cos
(
x
)
−
sin
(
2
x
)
sin
(
x
)
cos
(
2
x
)
cos
(
x
)
-
sin
(
2
x
)
sin
(
x
)
Step 1
cos
(
2
x
)
cos
(
x
)
−
sin
(
2
x
)
sin
(
x
)
cos
(
2
x
)
cos
(
x
)
-
sin
(
2
x
)
sin
(
x
)
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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