# Law of cosines/Related Articles

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*See also changes related to Law of cosines, or pages that link to Law of cosines or to this page or whose text contains "Law of cosines".*

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- Geometry [r]: The mathematics of spacial concepts.
^{[e]} - Law of sines [r]: The ratio of the sines of the angles of a triangle is equal to the ratio of the lengths of the opposite sides
^{[e]} - Trigonometric function [r]: Function of an angle expressed as the ratio of two of the sides of a right triangle that contains that angle; the sine, cosine, tangent, cotangent, secant, and cosecant.
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