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OpenStudy (anonymous):
Simplify 1+cos4theta using double angle formula
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OpenStudy (anonymous):
2*(cos{2theta})^2
OpenStudy (anonymous):
I dont follow, where as the 1 gone? and which formula did you use?
OpenStudy (anonymous):
\[2\cos^2\theta =\cos2\theta +1\]
OpenStudy (anonymous):
i think you understand
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