Sine of i

Theorem

 * $\sin i = \left({\dfrac e 2 - \dfrac 1 {2 e} }\right) i$

where $\sin$ denotes the complex sine function and $i$ is the imaginary unit.

Also see

 * Cosine of $i$
 * Tangent of $i$
 * Cotangent of $i$
 * Secant of $i$
 * Cosecant of $i$