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cosine
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Diagram of a right triangle labeled with sides a, b, and hypotenuse c, alongside formulas for the six trigonometric functions-sine, cosine, tangent, cosecant, secant, and cotangent-each defined by ratios of the triangle's sides. Four graphs display the curves of sine, cosine, tangent, and cotangent functions, each labeled with x- and y-axes, key angles in radians, and typical wave or asymptote patterns. Bessel functions Trihedral angles for derivation of the laws of (left) sines and (right) cosines for spherical trigonometry.

cosine: References & Edit History

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Article History

Type Description Contributor Date
Invalidated site: Dartmouth College - Department of Mathematics - The Sine and Cosine Functions (PDF). Sep 25, 2026
Article updated. Apr 01, 2025
Add new Web site: Dartmouth College - Department of Mathematics - The Sine and Cosine Functions (PDF). Mar 13, 2025
Add new Web site: EURASIA Journal of Mathematics, Science and Technology Education - Meaning and Understanding of School Mathematical Concepts by Secondary Students: The Study of Sine and Cosine. Nov 05, 2024
Add new Web site: Auburn University - Derivative of sine and cosine. Sep 27, 2024
Add new Web site: Mathematics LibreTexts - The Sine and Cosine Functions. Apr 24, 2024
Display issue corrected. May 28, 2023
New article added. May 26, 2023
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