Re: parametric: x = cos(t), y = sin(t)

In article <051220072314256947%plsperry@[EMAIL PROTECTED]
>, Paul Sperry
<plsperry@[EMAIL PROTECTED]
> wrote:

> In article <slrnfle9j7.h9u.dbast0s@[EMAIL PROTECTED]
>, Daniel C. Bastos
> <dbast0s@[EMAIL PROTECTED]
> wrote:
> 
[...]

> Another non-geometric approach is to define cos(t) = (u . v)/(|u|*|v|)
> where t is the angle between the vectors u and v.

[...]

Forgot to mention another im****tant non-geometric approach:

Define
sin(x) = [1/(2i)]*[exp(ix) - exp(-ix)] and 
cos(x) = [1/2]*[exp(ix) + exp(-ix)]

-- 
Paul Sperry
Columbia, SC (USA)