三角公式（Triangle formula）.doc

三角公式（Triangle formula） Baidu homepage | login registration news page post you know music picture video map encyclopedia library Help the homepage of the natural cultural geography historical life of the social arts peoples economic science and technology sports digital museum core user encyclopedia story: Egypt Trigonometric formula Encyclopedia card Trigonometric functions are functions of transcendental functions in mathematics that belong to elementary functions. Their essence is the mapping between the set of any Angle and a set of ratios. The usual trigonometric functions are defined in the plane rectangular coordinate system. Its domain is the entire real number field. Another definition is in a right triangle, but not completely. Modern mathematics describes them as the limit of infinite series and the solution of differential equations, extending its definition to complex Numbers. directory Related concepts acute Angle trigonometric functions triangle Special values Two angles and formulas Trigonometric formula And bad product Product and poor Induction of formula Double Angle formula Three times the Angle Other multiple angles Special formulas for other important formulas Gradient formula Half Angle formula The universal formula Auxiliary Angle formula The triangle rule The hyperbolic function Important theorem of sinusoids Cosine theorem Expand the concept of acute Angle trigonometric functions triangle Special values Two angles and formulas Trigonometric formula And bad product Product and poor Induction of formula Double Angle formula Three times the Angle Other multiple angles Special formulas for other important formulas Gradient formula Half Angle formula The universal formula Auxiliary Angle formula The triangle rule The hyperbolic function Important theorem of sinusoids Cosine theorem Expand the relevant concepts of this section Acute triangle function triangle Reciprocal relationship: tangent alpha - cotangent alpha = 1 The sine of alpha, CSC alpha