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 \(y ...

The reason for this is not immeadiatly obvious from the graph, however algebraicaly it is obvious: sec(x)sin(x) = sin(x)/cos(x) = tan(x), since sec(x) is 1/cos(x). Many products of trigonometric ...

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 \(y ...