Sin

Sine (sin) is a mathematical function that relates to angles in right-angled triangles and circles. For a given angle, sine measures the ratio of the length of the side opposite the angle to the hypotenuse (the longest side). In the context of the unit circle (a circle with radius 1), sine represents the vertical drop from the center to the point on the circle corresponding to that angle. It helps describe periodic phenomena like waves, sound, and light, providing a foundational tool in fields like physics, engineering, and mathematics.