👉 The term "cosines" refers to a specific type of trigonometric function, which is used in mathematics and physics. It is named after the Greek letter \(\cos\), which represents the sine of an angle. The cosine function is defined as follows: \[ \cos(x) = \frac{p}{q} \] where \(p\) and \(q\) are any two real numbers, and \(x\) is a variable that ranges from 0 to \(2\