2019-03-03 05:46:04 +08:00
|
|
|
const std = @import("../../std.zig");
|
2019-02-09 07:18:47 +08:00
|
|
|
const testing = std.testing;
|
2018-04-24 15:18:31 +08:00
|
|
|
const math = std.math;
|
|
|
|
const cmath = math.complex;
|
|
|
|
const Complex = cmath.Complex;
|
|
|
|
|
|
|
|
pub fn sin(z: var) Complex(@typeOf(z.re)) {
|
|
|
|
const T = @typeOf(z.re);
|
|
|
|
const p = Complex(T).new(-z.im, z.re);
|
|
|
|
const q = cmath.sinh(p);
|
|
|
|
return Complex(T).new(q.im, -q.re);
|
|
|
|
}
|
|
|
|
|
|
|
|
const epsilon = 0.0001;
|
|
|
|
|
|
|
|
test "complex.csin" {
|
|
|
|
const a = Complex(f32).new(5, 3);
|
|
|
|
const c = sin(a);
|
|
|
|
|
2019-02-09 07:18:47 +08:00
|
|
|
testing.expect(math.approxEq(f32, c.re, -9.654126, epsilon));
|
|
|
|
testing.expect(math.approxEq(f32, c.im, 2.841692, epsilon));
|
2018-04-24 15:18:31 +08:00
|
|
|
}
|