
RE(x+y*i)
Example:
RE(3+4*i) returns 3
Imaginary Part
Imaginary part, y, of a complex number, (x+y*i).
IM(x+y*i)
Example:
IM(3+4*i) returns 4
Unit Vector
Sign of value. If positive, the result is 1. If negative, –1. If zero, result is zero. For a complex number, this is the
unit vector in the direction of the number.
SIGN(value)
SIGN((x,y))
Examples:
SIGN(POLYEVAL([1,2,–25,–26,2],–2)) returns –1
SIGN((3,4)) returns (.6+.8i)
Arithmetic – Exponential
ALOG
Antilogarithm (exponential).
ALOG(value)
EXPM1
Exponential minus 1: e
x
-1.
EXPM1(value)
LNP1
Natural log plus 1: ln(x+1).
LNP1(value)
Trigonometry
The trigonometry functions can also take complex numbers as arguments. For SIN, COS, TAN, ASIN, ACOS, and
ATAN, see Keyboard functions on page 347.
CSC
Cosecant: 1/sin(x).
CSC(value)
Math menu 355
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