# Changes between Initial Version and Version 9 of Ticket #24211

Ignore:
Timestamp:
11/23/17 15:48:05 (4 years ago)
Comment:

Edit : added similar examples with arccos/arctan.

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• ## Ticket #24211

• Property Milestone changed from sage-8.1 to sage-8.2
• Property Dependencies changed from to #24262
• Property Summary changed from Sime trivial identities and simplifications missed by Sage (pynac ?) to Some trivial identities and simplifications missed by Sage (pynac ?)
• ## Ticket #24211 – Description

 initial sage: [maxima.atan(t).sage() for t in [0, 1/sqrt(3), 1, sqrt(3)]] [0, 1/6*pi, 1/4*pi, 1/3*pi] sage: [sympy.atan(t)._sage_() for t in [0, 1/sqrt(3), 1, sqrt(3)]] [0, 1/6*pi, 1/4*pi, 1/3*pi] }}} [ Edit on 2017-11-23 ] In the same vein : {{{ sage: [arccos(t) for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] [1/2*pi, 1/3*pi, arccos(1/2*sqrt(2)), arccos(1/2*sqrt(3)), 0] sage: [maxima.arccos(t).sage() for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] [1/2*pi, 1/3*pi, arccos(1/2*sqrt(2)), arccos(1/2*sqrt(3)), 0] sage: [sympy.acos(t)._sage_() for t in [0, 1/2, sqrt(2)/2, sqrt(3)/2, 1]] [1/2*pi, 1/3*pi, 1/4*pi, 1/6*pi, 0] sage: [arctan(t) for t in [0, 1/sqrt(3), 1, sqrt(3)]] [0, arctan(1/3*sqrt(3)), 1/4*pi, arctan(sqrt(3))] sage: [maxima.arctan(t).sage() for t in [0, 1/sqrt(3), 1, sqrt(3)]] [0, arctan(1/3*sqrt(3)), 1/4*pi, arctan(sqrt(3))] sage: [sympy.atan(t)._sage_() for t in [0, 1/sqrt(3), 1, sqrt(3)]] [0, 1/6*pi, 1/4*pi, 1/3*pi]