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Mathematics 13 Online
Vocaloid:

Quick Trig Integration Question

Vocaloid:

it's been a few years since I've taken calc, how did they get from sin(npix/a)^2 to sin(npix/a)cos(npix/a)

sillybilly123:

it's simply \(\alpha (\sin \beta x)' = \alpha ( \beta \cos \beta x)\) which is why all that stuff gets dumped outside the integratin

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