Solution
prove
Solution
Solution steps
Manipulating left side
Rewrite using trig identities
Use the Double Angle identity:
Expand
We showed that the two sides could take the same form
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Frequently Asked Questions (FAQ)
Is cos(3x)=cos^3(x)-3sin^2(x)cos(x) ?
The answer to whether cos(3x)=cos^3(x)-3sin^2(x)cos(x) is True