A couple of weeks ago, a reader was asking if we knew where to find a spreadsheet that could generate “quick-and-dirty” (or “cheap-and-cheerful”) sin and cos values. Well, the same reader has come ...

This circle has the centre at the origin and a radius of 1 unit. The point P can move around the circumference of the circle. At point P the \(x\)-coordinate is \(\cos{\theta}\) and the ...