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 change is a change of the composition of global atmosphere, observed over a period of time, and in comparison to other time periods, as a direct or indirect result of human activity.ntroduction to Climate change. Many people make Climate Change and Global Warming a scary and difficult thing to understand, but itâs not.