Jean Kelly from Dublin's Institute of Education is here with six videos full of great advice and tips for the exam.

The tangent is perpendicular to the radius which joins the centre of the circle to the point P. As the tangent is a straight line, the equation of the tangent will be of the form \(y = mx + c\).

Now, we’re grateful to have calculators to compute the equations we can ... Pi Day has one thing in common: it brings everything to a full circle.

4. Equation of tangent to a circle, 5. Equation of normal to a circle, 6. Equation of a circle passing through a line and touching a line, 7. Length of tangent from an external point, 8.

The tangent is perpendicular to the radius which joins the centre of the circle to the point P. As the tangent is a straight line, the equation of the tangent will be of the form \(y = mx + c\).