- #1
kiranm
- 11
- 0
Homework Statement
how do I take the real part of y2= A exp (4ix) exp (-2it)? And how does this determine that this wave propagates with constant speed compared to these wave disturbances:
y1= A sin (5x) exp (-2t)
y3= A sin (2x-5t) exp (-2t)
Homework Equations
exp(ix)= cos x + i sin x
The Attempt at a Solution
For Re(y2) i got A cos (4x) cos (-2t). I don't think that is correct i just don't know how to combine that because i know taking the real part is the cos but my attempt doesn't make sense.