👉 Cosine is a trigonometric function that describes the ratio of the length of an arc of a circle to its radius. It's often used in geometry and engineering, especially when dealing with circles or other curves. The cosine of an angle in radians is the ratio of the length of the side opposite the angle to the length of the hypotenuse. In mathematics, cosines are commonly denoted as c or cos(x). When working with complex numbers, cos(c) can be found using
