All angle arguments and functions that return an angle measurement use the current trigonometric mode which can be either radians or degrees. RAD sets the trigonometric mode to radians. The default trigonometric mode at start-up or after a SCRATCH A is radians. A subprogram will use the same trigonometric mode as its caller unless it executes a RAD or DEG statement. Upon returning to the caller the previous trigonometric mode is restored.
