## what's the period of this : f(x)=Asin(wx+k)-Bcos(ux+J)

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.

### what's the period of this : f(x)=Asin(wx+k)-Bcos(ux+J)

hi , I wanna know what's the period of this : f(x)=Asin(wx+k)-Bcos(ux+J). I have tried to find some lessons about that but just got nothing. so I hope sb could help me .thanks
PS: I think i should use the Greek letters but I have no idea how to input that on my blackberry...I can't use computer now
TimeSwing

Posts: 1
Joined: Wed Mar 10, 2010 2:16 am

### Re: what's the period of this : f(x)=Asin(wx+k)-Bcos(ux+J)

Hallo, nice to meet you. I'm new in this forum.

a) if w=n*u, or u=n*w, n integer, then the period (or here wavelength) were 2pi/min(u,w)

b) if w=m/n*u, with m, n integer, i think the period should be 2pi/n*u, with (n,m) minimal

c) if w=r*u, with r an irrational number, i think it's said a quasi-periodic case

bye.
jk22

Posts: 11
Joined: Sat Jun 26, 2010 10:39 am