Math.tan

[espruino-discuss]

Posted at 2015-12-24 by Sacha

Hi Gordon

This code works in node, but on a espruino we get NaN

R2D=57.29577951308;
D2R=0.01745329251;
L=1430093322686.17651367187;
RA = R2D * Math.atan(0.91764 * Math.tan(L * D2R));
console.log('Gordon:'+RA);

Node:

root@purple:~# cat test.js 
R2D=57.29577951308;
D2R=0.01745329251;
L=1430093322686.17651367187;
RA = R2D * Math.atan(0.91764 * Math.tan(L * D2R));
console.log('Gordon:'+RA);

root@purple:~# node test.js 
Gordon: 49.01889864197386
root@purple:~# 

Espruino 1V84:

 _____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v84 Copyright 2015 G.Williams
>echo(0);
Gordon:NaN
=undefined
> 

Merry Christmas

Sacha

[espruino-discuss]

Posted at 2015-12-24 by tve

>RA = R2D * Math.atan(0.91764 * Math.tan((L * D2R)%3.14159265359));
=48.92394847104

[gfwilliams]

Posted at 2016-01-04 by @gfwilliams

Thanks - so we're saying that Math.tan only works between -PI and PI? Should be easy enough to fix