public void testSin() {
assertEquals(Vba.sqr(0.5d), Vba.sin(Math.PI / 4d), SMALL);
}
public void testSqr() {
assertEquals(2d, Vba.sqr(4d), 0d);
assertEquals(0d, Vba.sqr(0d), 0d);
assertTrue(Double.isNaN(Vba.sqr(-4)));
}
public void testCos() {
assertEquals(1d, Vba.cos(0), 0d);
assertEquals(Vba.sqr(0.5d), Vba.cos(Math.PI / 4d), 0d);
assertEquals(0d, Vba.cos(Math.PI / 2d), SMALL);
assertEquals(-1d, Vba.cos(Math.PI), 0d);
}