Save guides, add subjects and pick up where you left off with your BBC account. As a tangent is a straight line it is described by an equation in the form \(y - b = m(x - a)\). You need both a ...

A tangent to a circle at point P is a straight line that touches the circle at P. The tangent is perpendicular to the radius which joins the centre of the circle to the point P. As the tangent is ...