const std = @import("../../index.zig"); const debug = std.debug; const math = std.math; const cmath = math.complex; const Complex = cmath.Complex; pub fn acos(z: var) Complex(@typeOf(z.re)) { const T = @typeOf(z.re); const q = cmath.asin(z); return Complex(T).new(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); debug.assert(math.approxEq(f32, c.re, 0.546975, epsilon)); debug.assert(math.approxEq(f32, c.im, -2.452914, epsilon)); }