I am curious as to why the gnome-calculator seems to calculate cos(pi) wrongly as seen in the picture. I tried to use different rad/deg settings without getting the correct result.
I am curious what the problem is, as the software surely has to be correct.
1 Answer
That's because the calculation of cos() is using degrees and not radians in your above example.
Using radians: cos(pi) = -1, note: cos(pi / 180) = 0.999848 (what you are seeing) Using degrees: cos(180) = -1
To change the angle units used, press the menu button in the top-right corner of the window and select Preferences. Trigonometry buttons are visible when in Advanced mode.
2
