kyra26
kyra26
16-05-2017
Mathematics
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How to find cos2theta
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clutchcity
clutchcity
16-05-2017
You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
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whitesoxlady
whitesoxlady
16-05-2017
These are the double angle formulas. What the other person mentioned above is the sum and difference formula.
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