Syntax:
set angles {degrees | radians} show angles
The angle specified in set grid polar is also read and displayed in the units specified by set angles.
set angles also affects the arguments of the machine-defined functions sin(x), cos(x) and tan(x), and the outputs of asin(x), acos(x), atan(x), atan2(x), and arg(x). It has no effect on the arguments of hyperbolic functions or Bessel functions. Note that the output of inverse hyperbolic functions of complex arguments are effected, however; if these functions are used, set angles radians must be in effect:
x={1.0,0.1} set angles radians y=sinh(x) print y #prints {1.16933, 0.154051} print asinh(y) #prints {1.0, 0.1}but
set angles degrees y=sinh(x) print y #prints {1.16933, 0.154051} print asinh(y) #prints {57.29578, 5.729578}