All of the trig functions you could want are here, plus hyperbolic functions and their inverses. They all use radians.
sin(pi / 2) This gives you 1.00. You also get cos, tan, sec, csc, and cot.
asin(1.00) Gives you 1.57, which is pi / 2. You also get acos, atan, asec, acsc, and acot.
sinh(1) Gives you 1.18. The other hyperbolic functions and their inverses are constructed the same way: by adding an h to the end of the name.