How to determine an angle in [-Pi,Pi]?

Question:How to determine an angle in [-Pi,Pi]?

Posted: Bendesarts 440 Product: Maple

April 25 2016

Hello,

After trigonometric manipulations in a mechanical problem, I can obtain the desired angles but defined with modulo 2Pi.

I would like to program or find a function which can do this operation :

While angle doesn't belong to [-Pi, Pi]

do

If angle > Pi then do angle = angle - 2Pi

If angle < - Pi then do angle = angle + 2Pi

end

Is there an existing function which can do this operation ?

Otherwise, may you help me to program it ?

Thanks a lot for your help

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