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Mathematics 9 Online
OpenStudy (lncognlto):

how to work out sinx=sin4x?

jhonyy9 (jhonyy9):

us sin(2x+2x) = so like sin(a+b) = ...

OpenStudy (anonymous):

\[x=n \Pi +(-1)^{n}4x\] solve for odd and even cases separately sorry, couldn't think of writing anything less than this

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