👉 The term "cotan" is a Latin word meaning "inverse tangent." It refers to an inverse function in trigonometry. Specifically, it's used when we want to find the angle whose sine is another number. For example, if we have a right triangle with sides of length \(a\) and \(b\), and we're asked to find the angle whose sine is 1/2 (since this is our reference angle for the unit circle), then we can use the inverse tangent

cotans