Francneto
Junior Member
Angola
3 Posts 
Posted  09/13/2007 : 08:15:01

Could you help me to solve the following problem:
Obtain the reduction formula for INT (cos^n[x]dx)
This is what I have tried:
Using integration by parts:
u = cos^(n1)(x) du = n cos^(n1)(x)sin(x) dx
dv = cos(x)dx v = sin(x)
cos^n(x) dx = sin(x)cos^(n1)(x) + integral cos^(n1)(x)sin^2(x) dx
That's all I could do! I don't know if it is right can you help to do the rest (i.e. obtain the reduction formul)?


