To put slimhazard's comments into visual form ...So what 'cos(rad(90))' gives depends on which side of 'cos(π/2)' it falls. If to the left you get a small positive number, to the right a small negative number. Just as you are seeing. The result you get isn't badly wrong, just slightly negative when you weren't expecting that.
If you want the cosine of a 90 degree angle to always deliver an exact zero I would suggest you need to avoid radians. Or apply some 'fudge factor'.
Code:
_|_ ___ | | |__ __| : | | | | : | |_ _| : | | | : |-------|---------------|--------- | :|_ _|: : | : | | : : | : |__ __| : : | : |___| : : | : : : : 0 90 180 270 360Degrees 0 1.5708 3.14159 4.71239 6.28319Radians (approx)If you want the cosine of a 90 degree angle to always deliver an exact zero I would suggest you need to avoid radians. Or apply some 'fudge factor'.
Statistics: Posted by hippy — Mon Jul 22, 2024 12:32 pm