Re: Still sucks balls, though.
Don't you think that it would've been wise to work in the three letters 'RAD' somehow? ;-)
No.
I am struggling to think of ANY programming language in which the mathematical sin and cos functions expect their arguments to be in anything other than radians ... not C or C++, not Pascal, not Modula, not Java, not Python, not Algol, not Fortran, not Ada ... Logo, perhaps? I've never used it.
JavaScript has very many faults and many infelicities but I cannot think that this is one of them.