Operation Manual

TI-83 Plus Math, Angle, and Test Operations 90
angle(
angle(
returns the polar angle of a complex number or list of complex
numbers, calculated as tan
L
1
(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.
angle(
a
+
bi
)
returns
tan
L
1
(b/a)
.
angle(
r
e^(
q
i
))
returns
q
, where
Lp
<
q
<
p
.
abs(
abs(
(absolute value) returns the magnitude (modulus),
(real2+imag2)
, of
a complex number or list of complex numbers.
abs(
a
+
b
i
)
returns
(a2+b2)
.
abs(
r
e^(
q
i
))
returns
r
(magnitude).