- #1
spaghetti3451
- 1,344
- 33
I need to convince myself that
##e^{ikr\text{cos}\ \theta}=\frac{\text{sin}\ \theta}{kr}##.
Could you please help me with it?
##e^{ikr\text{cos}\ \theta}=\frac{\text{sin}\ \theta}{kr}##.
Could you please help me with it?