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. The most familiar trigonometric functions are the sine, cosine, and tangent.
a long-term change in the earth's climate, especially a change due to an increase in the average atmospheric temperature: Melting glaciers imply that life in the Arctic is affected by climate change. Origin of climate change Expand.
climate. n. 1. (Physical Geography) the long-term prevalent weather conditions of an area, determined by latitude, position relative to oceans or continents, altitude, etc. 2. (Physical Geography) an area having a particular kind of climate. 3. a prevailing trend or current of feeling: the political climate.. a region or area characterized by a given climate: to move to a warm climate. 3. the prevailing attitudes, standards, or conditions of a group, period, or place: a climate of political unrest.