tan(pi/2)=-195948537906 (?)

[DA74254]

(06-10-2020 05:33 AM)cyrille de brébisson Wrote:  Hello,

Thanks Joe, I could not have said it (because I need to stay diplomatic

In some ways, this is why there is a CAS mode and a num mode on Prime.
num (home) is to do numerical calculations. calculations with number where a number is a number...
cas is to do symbolic calculations, where variables and math concepts are being worked on.
You want tan(PI/2) to be undefined? this is cas world, you want real number crunching, this is home mode...

I find it EXTREMLY frustrating when I am in the workshop, grab one of the kids (junior high school calc) calculator (they were forced to get some other brand!!!) try to find the hypothenuse of a triangle to cut a chunk of wood, and the thing returns some symbolic expression... I mean, my ruler does not have any marking at square root (50)! I want 7.07!
Prime, at the touch of a button will let you do the calculations in whatever domain you want. And I find it great.

Cyrille

Don't your kids calcs have an approx mode?