Equation help for Revit family parameters

[bbrumfield]

Hi everyone, I am new to Revit and primarily work with inventor and have hit a road block with this parameter equation. 

=TAN(15°*PI()/180°)*(Depth-1.500), Depth-1.5 = 11.5 in this case answer should be 3.081 the closest I've gotten throwing darts was = (Depth-1.500)*15°*pi()/180° which is returning 3.011

Any help would be greatly appreciated.

Thanks,

Brent F. Brumfield

[ToanDN]

What is Depth?

[bbrumfield]

In this case actual depth is 13.500 inches - 1.500 inches = 11.500 inches. The Depth can change the 1.500 dimension and 15 degree angle are constant.

[ToanDN]

Sorry I don't get it.  How can Depth varies and you expect the outcome to be a fixed value?  And 13.5-1.5 = 12 btw.

[bbrumfield]

Sotshould have been 13

[ToanDN]

TAN(15°*PI()/180°)

This doesn't make sense.  15d divided by 180d even out the unit.  It is no longer an angle to calculate TAN.

[bbrumfield]

The posted equation works with imparts or model states in Inventor. 11.5 would be the base length, 15 degas the angle. However I solved the issue. Parameter B = Depth(any) - 1.500 inches. Parameter Rise = B * tan(15deg)

[ToanDN]

---

@bbrumfield wrote:

The posted equation works with imparts or model states in Inventor. 11.5 would be the base length, 15 degas the angle. However I solved the issue. Parameter B = Depth(any) - 1.500 inches. Parameter Rise = B * tan(15deg)

---

The above formula makes sense. The original doesn't.  Why did you introduce pi()*180d is a mystery. 

[TripleM-Dev.net · Accepted solution]

See link below, an old post from "RevitForum" with possible revit formula's which includes calculations with angles:

https://www.revitforum.org/node/1126