Trigonometry Trigonometry from Greek trig non, triangle and metron, measure is a branch of mathematics that studies relationships involving lengths and angles of triangles.The field emerged in the Hellenistic world during the rd century BC from applications of geometry to astronomical studies. The rd century astronomers first noted that the lengths of the sides of a right angle triangle and the History of trigonometry Ancient Greek and Hellenistic mathematicians made use of the chord.Given a circle and an arc on the circle, the chord is the line that subtends the arc A chord s perpendicular bisector passes through the center of the circle and bisects the angle. Free Trigonometry Tutorials and Problems Free Trigonometry Tutorials and Problems Free tutorials and problems on solving trigonometric equations, trigonometric identities and formulas can also be found. Trigonometry Calculator Carbide Depot Enter all known variables sides a, b and c angles A and B into the text boxes To enter a value, click inside one of the text boxes. Trigonometry For Dummies Mary Jane Sterling A plain English guide to the basics of trig Trigonometry deals with the relationship between the sides and angles of triangles mostly right triangles. Trigonometry Calculus WebMath Trigonometry Calculus powered by WebMath Visit Cosmeo for explanations and help with your homework problems Trigonometry Mathematics Books Online shopping for Trigonometry Mathematics from a great selection at Books Store. The Six Trigonometric Functions Calculator An online easy to use calculator that calculate the six trigonometric functions The input may be either in degrees or radians Math Study Guides SparkNotes math We make the study of numbers easy as ,, From basic equations to advanced calculus, we explain mathematical concepts and help you ace your next test. InterActMath To get started, choose a book below and click Submit You can also search a book s contents by keyword.