[TestMethod] public void ArcSecCosec() => TestSimplify(@"\arccos\left(\frac{1}{\arcsin\left(\frac{1}{x}\right)}\right)", MathS.Arcsec(MathS.Arccosec(x)));
[Fact] public void TestArcsec() => Assert.Equal(MathS.Arcsec("x"), FromString("arcsec(x)"));
[Fact] public void ArcSecCosec() => TestSimplify(@"\arcsec\left(\arccsc\left(x\right)\right)", MathS.Arcsec(MathS.Arccosec(x)));