- #1

mjordan2nd

- 177

- 1

[tex]\sum E_{n} Cos \left( \frac{2 \pi X_{n}}{\lambda} \right) = E Cos \phi[/tex]

If this is the case, is it fair to say that

[tex]\sum E_{n} Sin \left( \frac{2 \pi X_{n}}{\lambda} \right) = E Sin \phi[/tex]

My text claims it is, though I can not figure out why. Any help would be appreciated.