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

In article <091220070110306162%plsperry@[EMAIL PROTECTED]
>,
Paul Sperry wrote:

> In article <slrnflmsg8.vcf.dbast0s@[EMAIL PROTECTED]
>, Daniel C. Bastos
><dbast0s@[EMAIL PROTECTED]
> wrote:
>
>> In article <081220072320219637%plsperry@[EMAIL PROTECTED]
>,
>> Paul Sperry wrote:
>> 
> [...]
>> >  Sometimes I want the geometric trig functions -
>> > the usual ratios; sometimes I want them just to be particular
functions
>> > of real numbers. It is non-trivial to show that the two coincide. My
>> > discussion of angles was mainly just to point out that there was more
>> > there than meets the eye. 
>> 
>> I'm interested in showing the two coincide; if you recall books from
the
>> top of your head that do show it, or provide details about it, I'd like
>> to have their names; even if I don't currently have background to read
>> them, the day may come.
>
> Rudin's "Principles of Mathematical Analysis" i.e. "Baby" Rudin. This
> should be in everyone's library anyway; Amazon sells a paperback which
> isn't _too_ expensive.

Thanks, Paul.