Mã:
public class GeoUtils { //Tinh sin, cos (don vi la do) private static int[] sin = { // Gia tri sin da nhan voi 2^14=16384 0, 285, 571, 857, 1142, 1427, 1712, 1996, 2280, 2563, 2845, 3126, 3406, 3685, 3963, 4240, 4516, 4790, 5062, 5334, 5603, 5871, 6137, 6401, 6663, 6924, 7182, 7438, 7691, 7943, 8191, 8438, 8682, 8923, 9161, 9397, 9630, 9860, 10086, 10310, 10531, 10748, 10963, 11173, 11381, 11585, 11785, 11982, 12175, 12365, 12550, 12732, 12910, 13084, 13254, 13420, 13582, 13740, 13894, 14043, 14188, 14329, 14466, 14598, 14725, 14848, 14967, 15081, 15190, 15295, 15395, 15491, 15582, 15668, 15749, 15825, 15897, 15964, 16025, 16082, 16135, 16182, 16224, 16261, 16294, 16321, 16344, 16361, 16374, 16381, 16384, 16381, 16374, 16361, 16344, 16321, 16294, 16261, 16224, 16182, 16135, 16082, 16025, 15964, 15897, 15825, 15749, 15668, 15582, 15491, 15395, 15295, 15190, 15081, 14967, 14848, 14725, 14598, 14466, 14329, 14188, 14043, 13894, 13740, 13582, 13420, 13254, 13084, 12910, 12732, 12550, 12365, 12175, 11982, 11785, 11585, 11381, 11173, 10963, 10748, 10531, 10310, 10086, 9860, 9630, 9397, 9161, 8923, 8682, 8438, 8191, 7943, 7691, 7438, 7182, 6924, 6663, 6401, 6137, 5871, 5603, 5334, 5062, 4790, 4516, 4240, 3963, 3685, 3406, 3126, 2845, 2563, 2280, 1996, 1712, 1427, 1142, 857, 571, 285, 0 }; private static int[] cos = { // Gia tri cos da nhan voi 2^14=16384 16384, 16381, 16374, 16361, 16344, 16321, 16294, 16261, 16224, 16182, 16135, 16082, 16025, 15964, 15897, 15825, 15749, 15668, 15582, 15491, 15395, 15295, 15190, 15081, 14967, 14848, 14725, 14598, 14466, 14329, 14188, 14043, 13894, 13740, 13582, 13420, 13254, 13084, 12910, 12732, 12550, 12365, 12175, 11982, 11785, 11585, 11381, 11173, 10963, 10748, 10531, 10310, 10086, 9860, 9630, 9397, 9161, 8923, 8682, 8438, 8192, 7943, 7691, 7438, 7182, 6924, 6663, 6401, 6137, 5871, 5603, 5334, 5062, 4790, 4516, 4240, 3963, 3685, 3406, 3126, 2845, 2563, 2280, 1996, 1712, 1427, 1142, 857, 571, 285, 0, -285, -571, -857, -1142, -1427, -1712, -1996, -2280, -2563, -2845, -3126, -3406, -3685, -3963, -4240, -4516, -4790, -5062, -5334, -5603, -5871, -6137, -6401, -6663, -6924, -7182, -7438, -7691, -7943, -8191, -8438, -8682, -8923, -9161, -9397, -9630, -9860, -10086, -10310, -10531, -10748, -10963, -11173, -11381, -11585, -11785, -11982, -12175, -12365, -12550, -12732, -12910, -13084, -13254, -13420, -13582, -13740, -13894, -14043, -14188, -14329, -14466, -14598, -14725, -14848, -14967, -15081, -15190, -15295, -15395, -15491, -15582, -15668, -15749, -15825, -15897, -15964, -16025, -16082, -16135, -16182, -16224, -16261, -16294, -16321, -16344, -16361, -16374, -16381, -16384 }; public static int sin(int x) { // Sin la ham le if (x < 0) { return (-sin(-x))>>14; } if ((x %= 360) <= 180) { return sin[x]>>14; } else { return -sin[360 - x]>>14; } } public static int cos(int x) { //Cos la ham chan if (x<0) { x=-x; } if ((x %= 360) <= 180) { return cos[x]>>14; } else { return cos[360 - x]>>14; } }}
Vòng tay phong thủy là một vật phẩm mang lại sự may mắn trong tài lộc, tình duyên, sự nghiệp,.. Là một vật phẩm không xa lạ gì với chúng ta, vòng tay phong thủy có nhiều màu, đa dạng và mỗi màu sắc...
Ý nghĩa và cách phân loại vòng tay...