All these functions work with double precision floating point numbers. They convert their argument to an IEEE 64-bit float and return a result of that type.
: acos arc cosine : asin arc sine : atan arc tangent : cos cosine : sin sine : tan tangent : cot cotangent : degrees convert an angle in radians to degrees. : radians convert an angle in radians to degrees. : atan2 arc tangent with x and y coordinates, can return an angle in any quadrant. : pi return pi.