- #1

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Cos^2 (wt+a) = 1+Cos(2wt+2a)

?

?

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- Thread starter Peon666
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- #1

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Cos^2 (wt+a) = 1+Cos(2wt+2a)

?

?

- #2

tiny-tim

Science Advisor

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(have an omega: ω and try using the X

Cos^2 (wt+a) = 1+Cos(2wt+2a)

?

(hmm … there's a factor of 2 missing …)

You need to learn all the standard trigonometric identities …

this one is 2cos

(rather like 2sin

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