Trigonometry - Wikipedia
Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships between side lengths and angles of triangles.The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. In particular, 3rd-century astronomers first noted  that the ratio of the lengths of ...
Trigonometry - Maths Resources
Trigonometry helps us find angles and distances, and is used a lot in science, engineering, video games, and more! Right-Angled Triangle. The triangle of most interest is the right-angled triangle.The right angle is shown by the little box in the corner:
trigonometry | Definition, Formulas, Ratios, & Identities ...
Trigonometry in the modern sense began with the Greeks. Hipparchus (c. 190–120 bce) was the first to construct a table of values for a trigonometric function.He considered every triangle—planar or spherical—as being inscribed in a circle, so that each side becomes a chord (that is, a straight line that connects two points on a curve or surface, as shown by the inscribed triangle ABC in ...
Trigonometry | Khan Academy
Learn trigonometry for free—right triangles, the unit circle, graphs, identities, and more. Full curriculum of exercises and videos.
Mathway | Trigonometry Problem Solver
Free math problem solver answers your trigonometry homework questions with step-by-step explanations.
Introduction to Trigonometry | SkillsYouNeed
Trigonometry, as the name might suggest, is all about triangles. More specifically, trigonometry is about right-angled triangles, where one of the internal angles is 90°. Trigonometry is a system that helps us to work out missing sides or angles in a triangle. There is more about triangles on our ...
Trigonometry | Definition of Trigonometry at Dictionary.com
Trigonometry definition, the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them. See more.
Trigonometry with right triangles | Math | Khan Academy
Learn the basics of trigonometry: What are sine, cosine, and tangent? How can we use them to solve for unknown sides and angles in right triangles?
Trigonometry Calculator. Simple way to find sin, cos, tan ...
This trigonometry calculator will help you in two popular cases when trigonometry is needed. If you want to find the values of sine, cosine, tangent and their reciprocal functions, use the first part of the calculator. Searching for the missing side or angle in a right triangle, using trigonometry?Our tool is also a safe bet!
Trigonometry: Theorems, formula, rules and Worksheets
more trig gifs . Graph of Sine (how graph relates to unit circle, symmetry of graph of sine) ; Graph of Cosine; Graph of Tangent: the graph and properties of y = tan(x) including asymptotes and symmetry of the graph . Amplitude of Sin (θ) and Cos (θ): how the equation relates to the graph of these equations