for i := 0; i < len(vc); i++ {
		if f := Abs(vc[i]); !veryclose(abs[i], f) {
			t.Errorf("Abs(%g) = %g, want %g", vc[i], f, abs[i])
		}
	}
	for i := 0; i < len(vcAbsSC); i++ {
		if f := Abs(vcAbsSC[i]); !alike(absSC[i], f) {
			t.Errorf("Abs(%g) = %g, want %g", vcAbsSC[i], f, absSC[i])
		}
	}
}
func TestAcos(t *testing.T) {
	for i := 0; i < len(vc); i++ {
		if f := Acos(vc[i]); !cSoclose(acos[i], f, 1e-14) {