Recent content by misa_808

If I were to describe the motion I would draw a picture of the sinusoidal wave and let the .5 and .2 graphed together showing waves and then I would say that a b sin wt is always 90degrees ahead of acos wt. But the sum of a cos wt and b sin wt produces a sinusoid of the same frequency...is this...

I used the equation u(t) = Asin(wt+0) I solved for displacement first u(t) = 0.5sin(3pi)(.4sec)+ 0 u (t) = 0.0328 and that is the answer for the first question but what I don't understand it that there is a cos cosine in the inital equation. So do I have to solve the cosine too inorder...

sorry I am not use to this so I will post my attempt to solve the problem

Equation given u(t) =0.2 cos (wt) + 0.5 sin (wt), where w=3pi rad/s and displacement is in feet. Describe the same motion using amplitute/phase format. Describe the same motion using complex notation For t =0.4 sec calculate u How do you calculate u? and how do you describe the...