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Sine, Cosine and Tangent (often shortened to sin, cos and tan) are each a ratio of sides of a right angled triangle: For a given angle θ each ratio stays the same. no matter how big or small the triangle is. To calculate them: Divide the length of one side by another side. Example: What is the sine of 35°?
In mathematics, sine and cosine are trigonometric functions of an angle.
Learn what sine is, how to calculate it, and how to use it in trigonometry. Find the sine values of common angles, use the sine calculator, and see the sine graph and unit circle.
Sine, Cosine and Tangent. The main functions in trigonometry are Sine, Cosine and Tangent. They are simply one side of a right-angled triangle divided by another. For any angle "θ": (Sine, Cosine and Tangent are often abbreviated to sin, cos and tan.)
Learn the sine function, a trigonometric function that gives the ratio of the side opposite to an angle and the hypotenuse in a right-angled triangle. Find out the domain, range, graph, table, identities, and examples of sine function.
Learn how to use the Law of Sines to solve triangles with one angle and two sides known, or two angles and one side known. See examples, formulas, diagrams and tips for finding unknown sides and angles.
Trigonometry is the branch of mathematics that deals with the relationships between angles and lengths of triangles. Learn about right triangles, the unit circle, trigonometric functions, graphs, equations, identities, and more with Khan Academy.
