# Homework Help: Deduction of Sin(i)

1. Oct 13, 2009

### soopo

1. The problem statement, all variables and given/known data

How can you calculate the value of sin(i)?

2. Oct 13, 2009

### zcd

$$e^{i\theta}=\cos\theta+i\sin\theta$$, and eventually you get to $$\sin\theta=\frac{e^{i\theta}-e^{-i\theta}}{2i}$$