Why Math.sin values are different from sin values in formula?

The Formula node, which uses an external library of functions, expects angles in radians. Documentation for the NCalc project‘s syntax can be found at http://ncalc.codeplex.com/wikipage?title=functions&referringTitle=Home


@abdelgawad I’d suggest using a code block instead of a formula node

…and post an issue on github regarding the formula node behavior

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