Cosine Function Evaluator
Evaluate the cosine function f(x) = cos(x) for a given angle x in radians. Visualize the cosine function with an interactive plot and copy results easily.
Enter Angle
Cosine Function Plot
About Cosine Function
The cosine function, denoted as cos(x), is a fundamental trigonometric function that describes the ratio of the length of the adjacent side to the length of the hypotenuse in a right-angled triangle. When considering a unit circle, cos(x) represents the x-coordinate of a point on the circle corresponding to an angle x in radians.
The cosine function is periodic with a period of 2π, meaning its values repeat every 2π radians. It oscillates between -1 and 1. Cosine is an even function, which means cos(x) = cos(-x). It is widely used in various fields like physics, engineering, and computer graphics to model wave phenomena, oscillations, and periodic motions.
Formula:
cos(x) = Adjacent / Hypotenuse
For further reading, you can refer to resources like: