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Precalculus Examples
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Precalculus
Find Trig Functions Using Identities cos(2theta)=cos(theta)^2-1/2
cos
(
2
θ
)
=
cos
2
(
θ
)
−
1
2
cos
(
2
θ
)
=
cos
2
(
θ
)
-
1
2
Step 1
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expression
entered or try another topic.
cos
(
2
θ
)
=
cos
2
(
θ
)
−
1
2
cos
(
2
θ
)
=
cos
2
(
θ
)
-
1
2
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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