[PD] cos~, feature or bug?

Mathieu Bouchard matju at sympatico.ca
Thu Feb 24 17:43:11 CET 2005

On Thu, 24 Feb 2005, Frank Barknecht wrote:
> > can someone please examine the attatched patch for me and see why I get
> > WAY different values for [cos~] and [expr~ cos($v1)] ?
> Because both expect input to be in different scales. the cos in expr
> wants radians.
> Try to input 1 and 3.14 =~ M_PI.
> cos~ will output 1 at input 1, "expr~ cos()" will output almost 1 at
> input 3.14.

Hmm, is this a bug in cos~ or a bug in the stated fact? cos(pi)=-1
normally. The period of cos(t) and sin(t) is 2pi, not pi.

That said, the period of tan(t) = sin(t)/cos(t) is only pi (because some
signs cancel each other during division).

Mathieu Bouchard -=- Montréal QC Canada -=- http://artengine.ca/matju

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