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Trig Error in CAS
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02-12-2016, 06:42 PM
(This post was last modified: 02-12-2016 07:06 PM by chazzs.)
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Trig Error in CAS
Can anyone explain to me (or recreate the bug) why acos(cos(2)) = 2pi - 2, and not 2, which you get when evaluating acos(cos(2.)). Works fine on the home side.
It seems 1 is the only (integer) value that is correct: acos(cos(1))=1. Worse is acos(cos(4)) = -2 pi + 4 = -2.2831 (Should be positive, or 2 pi - 4). These are all in radian mode. Degree mode seems to work fine. A little troubling, or I'm missing something. C |
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Trig Error in CAS - chazzs - 02-12-2016 06:42 PM
RE: Trig Error in CAS - DrD - 02-12-2016, 10:19 PM
RE: Trig Error in CAS - chazzs - 02-13-2016, 12:30 AM
RE: Trig Error in CAS - compsystems - 02-13-2016, 03:29 AM
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