👉 Tanbur is a term used in Islamic mathematics, particularly in the field of geometry and trigonometry. It refers to the ratio of the length of one side of a triangle to the length of its opposite angle. In trigonometry, the tangent function (tan) relates the lengths of two sides of a right-angled triangle. The tangent of an angle is defined as the ratio of the length of the opposite side to the length of the adjacent side in a right-angled triangle. For
