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Mathematics 7 Online
OpenStudy (anonymous):

How do I rearrange y=cos(x) so y is the variable?

OpenStudy (phi):

as posted, y is the dependent variable and x is the independent variable. are you asking how to make y the independent variable? "take" the inverse cosine of both sides \[ \cos^{-1} y = x \]

OpenStudy (anonymous):

Yeah, that. How would I do that for sin(2x) then?

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