- #1
kpx001
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Homework Statement
which of the wave functions describe a wave that moves in the -x direction
y(x,t) =Asin(-kx-wt)
y(x,t)=Asin(kx+wt)
y(x,t)=Acos(kx+wt)
Homework Equations
wave function
The Attempt at a Solution
I know B and C both move left looking at the phase (kx+wt) because its +, however I have no idea about A. I don't know how to convert between sin and cosine or any knowledge of adding pi/2 or anything. can anyone explain this to me? Thank you