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.
Emotional Factors. A variety of emotional factors can cause your stool to become yellow in color. In most cases this is a sign that food moved through the body too quickly, causing the body to develop diarrhea. Your stool will turn yellow because of the presence of bilirubin created by the liver and fat in the stool.