invers function

[Marco1954]

the tan of 45° = 1

What kind of function or formula should be needed in ptc to invers 1 into 45° ?

thank you 

Marco

[Fred_Kohlhepp · Accepted solution]

As in normal math, "atan" represents the arc tangent function:

[Marco1954]

thank you very much

as I'm a real newby I hat atan(1)=0.785 but did not know I hat to place the ° sign behind.

All's OK now , thank you 

Have a nice evening

Marco , France

[ttokoro]

[Fred_Kohlhepp]

Mathcad's default unit for angle is radians.  You change units as you would any other expression by replacing the default with the unit of your choice.  (Since radians have no "real" units none shows for default.)  Mathcad allows "°" as a unit for degrees, I prefer "deg" but that's just personal preference.

[LucMeekes]

That may be a personal preference,

international standards (ISO 80000-1) specifically state:

Luc

[ValeryOchkov]