CAS cos(45)

06302015, 05:04 PM
(This post was last modified: 06302015 06:37 PM by rgallier.)
Post: #1




CAS cos(45)
Why does CAS report cos(45)=sqrt(2)^1 instead of sqrt(2)/2. angle mode is degrees and software is 7820.


06302015, 05:20 PM
Post: #2




RE: CAS cos(45)
http://www.wolframalpha.com/input/?i=cos%2845%C2%B0%29 ???
However, you should probably update your calculator. TW Although I work for HP, the views and opinions I post here are my own. 

06302015, 05:38 PM
Post: #3




RE: CAS cos(45)
I would think it should avoid sqrt in the denominator and return sqrt(2)/2.


07022015, 12:58 AM
Post: #4




RE: CAS cos(45)
(06302015 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). <0ΙΈ0> Joe 

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