Posted by jessica on Sunday, October 7, 2007 at 7:50pm.
how would i find the derivative of this problem: t.3t^2+cos 4t? I don't know how to find the derivative of cos 4t

math  bobpursley, Sunday, October 7, 2007 at 8:19pm
d/dx cos4x= sin 4x (4) or 4sin(4x)