22 lines
550 B
Zig
22 lines
550 B
Zig
const std = @import("../../index.zig");
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const debug = std.debug;
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const math = std.math;
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const cmath = math.complex;
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const Complex = cmath.Complex;
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pub fn acos(z: var) Complex(@typeOf(z.re)) {
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const T = @typeOf(z.re);
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const q = cmath.asin(z);
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return Complex(T).new(T(math.pi) / 2 - q.re, -q.im);
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}
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const epsilon = 0.0001;
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test "complex.cacos" {
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const a = Complex(f32).new(5, 3);
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const c = acos(a);
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debug.assert(math.approxEq(f32, c.re, 0.546975, epsilon));
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debug.assert(math.approxEq(f32, c.im, -2.452914, epsilon));
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}
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