Save guides, add subjects and pick up where you left off with your BBC account. As the tangent is a straight line, the equation of the tangent will be of the form \(y = mx + c\). We can use ...

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 ...