#2643 acos(cos(x)) => itself

None
closed
nobody
None
5
2013-10-21
2013-10-21
No

Rather surprisingly, acos(cos(x)) doesn't simplify to x.

Discussion

  • Raymond Toy

    Raymond Toy - 2013-10-21

    Probably because acos(cos(100)) is not 100.

    Set triginverses:all to get this simplification. (It took me a while to find the triginverses flag.)

     
  • Rupert Swarbrick

    Duh, stupid me. Thanks for explaining (and pointing out the magic option!)

     
  • Rupert Swarbrick

    • status: open --> closed
     

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