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OpenStudy (lncognlto):
how to work out sinx=sin4x?
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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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