1. The problem statement, all variables and given/known data y(x,t)=[(4.8mm)sin(x/3.6m)cos(130rad/s)t] find Amplitude, wavelength and velocity of wave from the two combined waves. there are two waves here, combined into one, show each wave function: y1(x,t) and y2(x,t). 2. Relevant equations ok, i can fully manipulate the wave function when it's in it's basic form of y(x,t)=Acos(kx-wt+phi) but i must be missing something here. is the problem in a form that can be worked or must it be reworked with a trig function? it's all being multiplied so i'm not sure how to get it into the (kx-wt) format. any help would be appreciated. thanks. 3. The attempt at a solution because they are two waves in this equation Amplitude is (4.8mm/2)=2.4mm... correct? wave length can be found using kx= [2(pi)x]/(lambda) and velocity will be found using wt=2(pi)tf to find frequency and then v=(lambda)(frequency) my question is do i need to change the equation? or can i just use it as is? I don't have the answer to this question, so if you can point me in the right direction?