Trigonometric table

Lists of values of mathematical functions Trigonometry Outline History Usage Functions (sin, cos, tan, inverse) Generalized trigonometry Reference Identities Exact constants Tables Unit circle Laws and theorems Sines Cosines Pythagorean theorem Tangents Cotangents Calculus Trigonometric substitution Integrals (inverse functions) Derivatives Trigonometric series Mathematicians Hipparchus Ptolemy Brahmagupta al-Hasib al-Battani Regiomontanus Viète de Moivre Euler Fourier vte In mathematics, tables of trigonometric functions are useful in a number of areas. Before the existence of pocket calculators, trigonometric tables were essential for navigation, science and engineering. The calculation of mathematical tables was an important area of study, which led to the development of the first mechanical computing devices. Trigonometric calculations played an important role in the early study of astronomy. Early tables were constructed by repeatedly applying trigonometric identities (like the half-angle and angle-sum identities) to compute new values from old ones. Modern computers and pocket calculators now generate trigonometric function values on demand, using special libraries of mathem