Hi!
I also needed to use the sin function, and didn't suceed because the sin function expects degrees in radians and putting the radians function returned the following error:
DEG_TO_RAD was not declared in this scope
also the sin function always returned a zero value, maybe because I was using an integer instead of a float. By the way what's the status on floats, is it supported by Arduino? the reference webpage lacks information on it.
Thanks!