The sine function, Sin(x), is a trigonometric function that describes the relationship between an angle and the lengths of the sides of a right-angled triangle.
In a unit circle, it represents the y-coordinate of a point on the circumference as a function of the angle. Its graph forms sinusoidal waves and is used in mathematics, physics, and engineering to model oscillatory and periodic phenomena, such as sound waves and vibrations.
The sine function oscillates between -1 and 1, generating fundamental repetitive patterns in mathematical analysis and applied sciences.