If Cnc" is the MacLaurin series for 3x arctan (7x ) then: (hint: you can start with the series for n=0 f(x) = arctan(x)) C3 = C5 = C7 = Cg C11 =\fStarting with a known series, find a series expansion centered at x = 0 for th sin (t) dt. O OO n= 0