Things you should know (Additional to AS level)

Here are a few things that I think that you should know by heart, even if you do have formula booklets to help. [addesslist]

• RFactorising the difference of two squares
• RTrigonometric identities
• RFormula for solving a quadratic
• RThe discriminant of a quadratic
• RTrigonometry: cotangent, secant and cosecant
• RThe trigonometry A+B formulae