Brightstorm Q & A : what am I suppose to do with this? cos^2(x/4) - sen^2(x/4) = ~ do i need to use lowering power and half-angle formulas? I'm very confused . Any help will be sincerily appreciated.

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You have to use to the half-angle formulas.

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Sadie May 01, 2010

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Would it be possible to use logarithms in this situation? I am not sure...

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Huiho May 01, 2010

Flag this because it ...