@Test
	public void testTanDegrees() {
		double tan = SundialCalculations.tanDegrees(0);
		assertEquals(0, tan, 0);
		tan = SundialCalculations.tanDegrees(45);
		assertEquals(1, tan, 0.001);
		tan = SundialCalculations.tanDegrees(90);
		assert tan > 100000000000000.0;
	}