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OpenStudy (aonz):
Check my working out pls :) write an expression for sin3x
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OpenStudy (aonz):
sin(2x+x) sin2xcosx+cos2xsinx
OpenStudy (aonz):
2sinxcosxcosx + sinx(1-sin^2 x) 2sinx cos^2 x + sinx - sin^3 x
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