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CAS cos(45) - rgallier - 06-30-2015 05:04 PM
Why does CAS report cos(45)=sqrt(2)^-1 instead of sqrt(2)/2. angle mode is degrees and software is 7820.
RE: CAS cos(45) - Tim Wessman - 06-30-2015 05:20 PM
http://www.wolframalpha.com/input/?i=cos%2845%C2%B0%29 ???
However, you should probably update your calculator.
RE: CAS cos(45) - rgallier - 06-30-2015 05:38 PM
I would think it should avoid sqrt in the denominator and return sqrt(2)/2.
RE: CAS cos(45) - Joe Horn - 07-02-2015 12:58 AM
(06-30-2015 05:38 PM)rgallier Wrote: I would think it should avoid sqrt in the denominator and return sqrt(2)/2.
It does, if you change the CAS "Simplify" Setting to either None or Maximum. It only returns 1/sqrt(2) when Simplify is set to Minimum, which unfortunately is the default setting. (FWIW, I keep mine on "None" at all times, and press the simplify button when the mood strikes).