👉 The term "biangular" is a term used in mathematics, specifically in the field of algebraic geometry. It refers to a type of plane curve that has two branches parallel to each other and can be defined by an equation involving trigonometric functions such as sine and cosine. In particular, biangular curves are often studied in the context of hyperbolic geometry, which is the branch of geometry that deals with the properties of the surfaces of conic sections. In this context, a bi