Michael Somos on Thu, 9 Jan 2003 13:25:41 -0500

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Igor Schein wrote:

> ? tan(Pi/2)
> -39614081257132168796771975169.

which is to be expected. The tan() function has poles due to cos().
The value of cos(Pi/2) depends of the realprecision. Sometimes it
is zero, sometimes it isn't. Try the following code to see this :

? for(n=1,40,default(realprecision,n);print(n" "cos(Pi/2)))

Shalom, Michael