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Inverse Tangent

Chad_FortuneChad_Fortune Member Posts: 6 PRO
I see Inverse Tangent "atan()" exposed inside FeatureScript documentation, but when I try to use it in a Part Studio I get errors. I created a Featurescript to be able to use the inverse tangent to pull the answer out. Inverse tangent is a pretty commonly used in trig and the workaround is a backwards way of getting an answer.

On a side note, atanh and tanh functions are shown under Math: math, but the atan, asin, and acos functions are under Math: units. Other trig functions are located under both tags.

Comments

  • ilya_baranilya_baran Onshape Employees, Developers, HDM Posts: 1,173
    Without specific errors, I can't be sure, but the reason is probably that atan returns an angle, not a number.  That is also the reason for the difference in which FS module they are located in.
    Ilya Baran \ VP, Architecture and FeatureScript \ Onshape Inc
  • john_mcclaryjohn_mcclary Member, Developers Posts: 3,890 PRO
    OnShape in very picky about it's units.

    try throwing a '/ degree' at the end of atan if you just want a unitless number, and make sure you add '* degree' where degrees are required for input.

    I've had a similar problem in an equation, here is what my result looked like in the end to clear all the errors:
    atan(((DeltaY_90 / Shingles_Per_90)- .3125) / (sin(90 * degree / Shingles_Per_90) * (Outside_Dia / 2))) / degree;

    Hope that helps
  • Chad_FortuneChad_Fortune Member Posts: 6 PRO
    Thanks John, I'm still getting used to having to add those.
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