ARG

Member Of Menu: 
Trig
Complex
Argument Types: 
Real
Complex
Symbol
Expression
Result Type(s): 
Real
Expression
Invertible: 
No
Valid In Expression: 
Yes
Stack Diagram: 
Real1 Real2
Complex1 Real2
Symbol1 Expression2
Expression1 Expression2

This function takes a complex argument and returns the angle given the real and imaginary components of that complex value. That angle may be expressed in degrees or radians depending on the mode of the calculator (see RAD and DEG for more information about these modes). If this function is passed a positive real value, 0 is returned. If this function is passed a negative real value, 180 degrees or π radians is returned (depending on whether operating in degrees or radians mode).