R: Strange trig function behavior

Question

As a Matlab user transitioning to R, I have ran across the problem of applying trigonometric functions to degrees. In Matlab there are trig functions for both radians and de

Answer 1

The same reason that

1-(1/3)-(1/3)-(1/3)

doesn't equal 0. It has something to do with floating point numbers. I'm sure there will be more elaboration.