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.
Although the presence of mucus in stool is common, you normally don't see it because it is typically clear. Noticeable white or yellow mucus may indicate inflammation or irritation in the wall of the intestines and be a symptom of an underlying health issue.