4b4fbe3887
This change was mostly made with `zig fmt` and this also modified some whitespace. Note that in some files, `zig fmt` produced incorrect code, so the change was made manually.
23 lines
594 B
Zig
23 lines
594 B
Zig
const std = @import("../../std.zig");
|
|
const testing = std.testing;
|
|
const math = std.math;
|
|
const cmath = math.complex;
|
|
const Complex = cmath.Complex;
|
|
|
|
/// Returns the arc-cosine of z.
|
|
pub fn acos(z: var) Complex(@TypeOf(z.re)) {
|
|
const T = @TypeOf(z.re);
|
|
const q = cmath.asin(z);
|
|
return Complex(T).new(@as(T, math.pi) / 2 - q.re, -q.im);
|
|
}
|
|
|
|
const epsilon = 0.0001;
|
|
|
|
test "complex.cacos" {
|
|
const a = Complex(f32).new(5, 3);
|
|
const c = acos(a);
|
|
|
|
testing.expect(math.approxEq(f32, c.re, 0.546975, epsilon));
|
|
testing.expect(math.approxEq(f32, c.im, -2.452914, epsilon));
|
|
}
|