Re: cos

[karl]

Am 29.10.2015 um 02:28 schrieb Jonathan Camilleri:

cos(1) returns 0.54030

My calculator Casio fx-100D returns cos(1) as 0.999847695.

Using Octave 4.0.0/Win8.1.

I am not sure whether to post this as a bug to http://savannah.gnu.org/bugs/?group=octave, as I still have not identified the mathematical roots of cosine.

Casio Headquarters are in Shibuqa, Tokyo Japan.

Further reading

1. https://en.wikipedia.org/wiki/Trigonometric_functions

Thanks and regards,

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Jonathan Camilleri

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If you would have read the f* manual after you encountered the problem, it would have been clear:

https://www.gnu.org/software/octave/doc/interpreter/Trigonometry.html

that the function cos expects as input radians. If you don't know what radian is, please consult an
appropriate textbook of your choice.
Good luck