Solution
prove
Solution
Solution steps
Manipulating left side
Rewrite using trig identities
Rewrite as
Use the Angle Sum identity:
Simplify
Apply exponent rule:
Add the numbers:
Apply exponent rule:
Add the numbers:
We showed that the two sides could take the same form
Popular Examples
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Frequently Asked Questions (FAQ)
Is cos(2α)=cos^2(α)-sin^2(α) ?
The answer to whether cos(2α)=cos^2(α)-sin^2(α) is True