A quadratic equation is drawn as a curve on a set of axes. This type of curve is called a parabola and it is symmetrical. To draw the graph we need coordinates. We generate these coordinates by ...

Draw the radius from the centre of the circle to P. The tangent will have an equation in the form \(y = mx + c\). First, find \(m\), the gradient of the tangent. The gradient of the radius is ...