Cosine Calculator
Calculate the cosine of an angle with ease. Enter your angle in degrees or radians and visualize the result.
Result:
Cosine of angle:
Right Triangle Visualization
Understanding Cosine
In trigonometry, the cosine of an angle in a right triangle is the ratio of the length of the adjacent side to the length of the hypotenuse. It's one of the fundamental trigonometric functions, along with sine and tangent.
Formula: Cosine (θ) = Adjacent / Hypotenuse
The cosine function is periodic with a period of 2π radians or 360 degrees. It ranges from -1 to 1. This calculator helps you quickly find the cosine value for any given angle, whether in degrees or radians, and visualizes it in a right triangle.
Use Cases: Cosine is used extensively in physics, engineering, and mathematics, especially in problems involving angles and periodic motion. For example, in physics, it's used to resolve vectors into components and in wave analysis.
Learn more about cosine on Wikipedia or explore trigonometric functions on MathWorld.