Comments: Funny Graphics

It's true; while that is of course not the whole of the man, whenever I see a gator I think of Jim! ;)

Posted by pam at March 5, 2012 06:35 AM

In order to move the sign from inside to outside you must multiply by the negative to remove the negative in which case a positive would appear.

Posted by Rave at March 6, 2012 09:29 AM

I think it is because of the symmetry of the function. The same wouldn't hold true of sin(x), since sin(-x) = -sin(x).

Posted by PeggyU at March 6, 2012 02:42 PM

There are some trigonmetric identities that apply. I botched this one because I had sin on the brain. sin(-x)=-sinx, but cos(-x)=cosx. Cosine functions are what they call 'even' functions. Sine is an odd function.

Posted by Bou at March 6, 2012 04:12 PM