Ola Mas
sen(x)*sen(3x) = (cos(2x)-cos(4x))/2
cos(x)*cos(3x) = (cos(2x)+cos(4x))/2
E = -cos(4x)
pronto
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Answers & Comments
Ola Mas
sen(x)*sen(3x) = (cos(2x)-cos(4x))/2
cos(x)*cos(3x) = (cos(2x)+cos(4x))/2
E = -cos(4x)
pronto