[PD] no pd?? WTF ????

Mathieu Bouchard matju at artengine.ca
Fri Jan 13 22:09:13 CET 2012

Le 2012-01-13 à 20:12:00, martin.peach at sympatico.ca a écrit :

> In the attached patcher clicking on [1( calculates pi, which gets 
> printed to a number box and the screen in 5 digit precision as 3.14159, 
> but the subsequent [sin] object gives a value much closer to zero than 
> when you click on [3.14159(, so the numbber box is hiding some extra 
> precision.

When x is close to pi, sin(x) is close to x-pi.

Neat trick for computing an approximation of x-pi without having to state 
what pi is.

Though you could actually do [expr x-2*asin(1)] instead.

The difference between sin(x) and x-pi is only about ⅓(x-pi)², so it 
doesn't really matter.

| Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC

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