- #1
boddhisattva
- 10
- 0
Homework Statement
Given an electric field:
E=Ex*ex+Ey*ey
with
Ex=cos(kx-wt)
Ey=cos(kx-wt+e)
where e is the phase difference
Show that
Ex^2 + Ey^2 - 2*Ex*Ey*cos(e) = ( sin(e) )^2
Homework Equations
Ex=cos(kx-wt)
Ey=cos(kx-wt+e)
The Attempt at a Solution
Was unable to find a solution with trigonometric relations