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sine
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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. Trihedral angles for derivation of the laws of (left) sines and (right) cosines for spherical trigonometry. Diagram of a circle with center O showing two radii labeled r, a central angle A, and a chord labeled c opposite the angle, illustrating the trigonometric relationship between the chord length and the angle.

sine: 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
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: MIT OpenCourseWare - The sine product formula and the gamma function. Jul 16, 2024
Add new Web site: Mathematics LibreTexts - The Sine and Cosine Functions. Apr 24, 2024
Add new Web site: Wolfram MathWorld - Sine. Jan 19, 2024
Add new Web site: Story of Mathematics - The Sine Rule οΏ½ Explanation & Examples. Jul 18, 2023
Corrected display issue. May 28, 2023
New article added. May 26, 2023
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