Angle - Texas Instruments TI-83 Manual Book

angle(

returns the polar angle of a complex number or list of complex
angle(
L1
numbers, calculated as tan (b/a), where b is the imaginary part and a is
the real part. The calculation is adjusted by +p in the second quadrant or
Np in the third quadrant.
returns L1 .
angle( a + bi ) tan (b/a)
, where Lp<
returns <p.
q i q q
angle( r e^( ))
abs(
(absolute value) returns the magnitude (modulus),
abs( (real2+imag2) , of
a complex number or list of complex numbers.
returns
abs( a + bi ) (a2+b2) .
q i returns (magnitude).
abs( r e^( )) r
TI-83 Plus Math, Angle, and Test Operations 90