## Essential Formulae

**Volumes and Surface Areas**

Volume of Cone

Curved Surface Area of Conewhere l is the slant height.

Volume of Sphere

Surface Area of Sphere

**Probability**

If two eventsandare independent with probabilitiesandrespectively then the probability ofandboth happening,

If the probability of an eventhappening isand then areoccasions in whichmay happen then the expected number of occurrences ofis

**Integration and Differentiation**

**Trigonometry**

**Geometry**

Ifat a pointthem the equation of the tangent atisand the equation of the normal is

A circle with equationhas centreand radius