**Author:** `rene.kijewski`

**Description:**

There are several cases, when trigonometrical functions like sine or cosine could be usefull. I experienced this issue as I missed a proper functionality to calculate the (co)sine to do a polar projection.

It would be nice if expressions like {{#expr:sin (pi*1.5)}} would be working without workarounds like [[mw:Extension:MathStatFunctions]] or Taylor polynoms. I propose a patch enabling (unary) sin, cos, tan, asin, acos, atan, exp and ln, (binary) ^, and pi as a constant.

(Lacking a proper diff tool I used de.wp to do the diff)

http://de.wikipedia.org/w/index.php?title=Benutzer%3ARevolus%2FExpr.php&diff=43186472&oldid=43185892

**Version**: unspecified

**Severity**: enhancement