[PD] basic DSP stuff

[Frank Barknecht]

Hallo,
Piotr Majdak hat gesagt: // Piotr Majdak wrote:

> Chuckk Hubbard wrote:
> >i*sin(a) and i*sin(b) multiply to -sin(a)sin(b)?
> 
> let's forget the sin*sin and look at the i*i part only: since i = 
> sqrt(-1) by definition, i*i is -1 (slowly: i*i= sqrt(-1)*sqrt(-1) = 
> sqrt(-1 * -1) = sqrt((-1)^2) = -1)

Your equations are a bit, uhm, misleading, because (-1)^2 is 1, so
sqrt(-1 * -1) = sqrt(1) = 1

Anyway, i is the unit, which fulfills the equation: i*i = -1

Ciao
-- 
 Frank Barknecht                 _ ______footils.org_ __goto10.org__