Problem with acos

• Subject: Problem with acos
• From: Luigi Marino
• Date: Mon, 16 May 2011 09:56:27 +0200

Hi 
for many CAS software (e.g. Maple 12 , MuPad 4)
acos(cos(x)) is not equal to cos(acos(x)).
Maxima 
integrate(cos(acos(x)),x,0,%pi/2) =pi^2/8
it is correct.
Luigi Marino

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