In mathematics, the trigonometric functions (also called the circular functions) are functions of an angle. They relate the angles of a triangle to the lengths of its sides. Trigonometric functions are important in the study of triangles and modeling periodic phenomena, among many other applications.
Yellow stool is typically due to an excess of fatty foods and grease in the diet. Mayo Clinic states that it can also be caused by a malabsorption disorder such as celiac disease.
Learning What Different Stool Colors May Indicate. 1  1. Check for red or black stools. These could both potentially be a sign of something going wrong in your digestive system. 2  2. Look out for white, gray, or light-colored stool. Bile contributes to the coloring of stool, so this lack of color could actually indicate the absence of bile.