Etymologically, the word sine derives from the Sanskrit word for half the chord ("jya-ardha", abbreviated to "jiva"). Arabic modified it to "jiba", written "jb", vowels not being ...

The sine function sinx is one of the basic functions encountered in trigonometry (the others being the cosecant, cosine, cotangent, secant, and tangent). Let theta be an angle ...

The sine wave or sinusoid is a function that occurs often in mathematics, physics, signal processing, audition, electrical engineering, and many other fields.

noun . 1. Trigonometry. a. (in a right triangle) the ratio of the side opposite a given acute angle to the hypotenuse. b. (of an angle) a trigonometric function equal to the ratio ...