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Mathematics 15 Online
OpenStudy (anonymous):

How do you verify (cosx)(cosx+sinx)(sinx)=1

OpenStudy (anonymous):

It can't be equal to 1.

OpenStudy (anonymous):

put, for example, x=0. then you get a zero answer or 0=1?

OpenStudy (solomonzelman):

true, can't be 90 either, |dw:1384803359541:dw|

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