mirror of
https://github.com/lcn2/calc.git
synced 2025-08-19 01:13:27 +03:00
36 lines
896 B
Plaintext
36 lines
896 B
Plaintext
NAME
|
|
polar - specify a complex number by modulus (radius) and argument (angle)
|
|
|
|
SYNOPSIS
|
|
polar(r, t [, eps])
|
|
|
|
TYPES
|
|
r real
|
|
t real
|
|
eps nonzero real, defaults to epsilon()
|
|
|
|
return number (real or complex)
|
|
|
|
DESCRIPTION
|
|
Returns the real or complex number with real and imaginary parts
|
|
multiples of epps nearest or next to nearest to r * cos(t) and
|
|
r * sin(t) respectively. The error for each part will be less
|
|
than 0.75 * abs(eps), but usually less than 0.5 * abs(eps).
|
|
|
|
EXAMPLE
|
|
> print polar(2, 0), polar(1, 2, 1e-5), polar(1, 2, 1e-10)
|
|
2 -.41615+.9093i -.4161468365+.9092974268i
|
|
|
|
> pi = pi(1e-10); eps = 1e-5
|
|
> print polar(2, pi/4, eps), polar(2, pi/2, eps), polar(2, 3*pi/4, eps)
|
|
1.41421+1.41421i 2i -1.414215+1.41421i
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LIBRARY
|
|
COMPLEX * cpolar(NUMBER *r, NUMBER *t, NUMBER *eps);
|
|
|
|
SEE ALSO
|
|
abs, arg, re, im
|