This proof section contains has 34 videos on all the theorems, constructions and proofs that are on the leaving cert course. Easy to understand and easy to follow. These are a must for everyone doing higher-level maths. These are the handiest marks on the whole exam. That are vital - a must get right section.

Module 1 | Complex Numbers |

Unit 1 | Cos3A - Preview |

Unit 2 | Properties of Polar Form |

Unit 3 | Cos Cubed |

Module 2 | Financial Maths |

Unit 1 | Amortization |

Module 3 | Proof by Contradiction |

Unit 1 | Square Root of 2 |

Module 4 | Proof by Induction |

Unit 1 | De Moivre's Theorem |

Unit 2 | Sum of r squared |

Module 5 | Constructions |

Unit 1 | 60 Degrees |

Unit 2 | Bisect a Line |

Unit 3 | Bisect a Angle |

Unit 4 | Centroid |

Unit 5 | Orthocentre |

Unit 6 | Incircle |

Unit 7 | Circumcentre |

Unit 8 | Tangent to a Circle |

Unit 9 | Triangle Given 3 Sides |

Unit 10 | Triangle given 2 sides and an Angle |

Unit 11 | Triangle with 1 length and 2 angles |

Unit 12 | Divide a Line into 3 |

Unit 13 | Perpendicular Line through Point not on line |

Module 6 | Theorem |

Unit 1 | Theorem 1 |

Unit 2 | Theorem 2 |

Unit 3 | Theorem 3 |

Module 7 | Trig Proofs |

Unit 1 | Sin Rule |

Unit 2 | Cosine Rule |

Unit 3 | Sin sq +Cos sq =1 |

Unit 4 | 30,45, and 60 |

Unit 5 | Cos(A-B) |

Unit 6 | Cos(-A)=CosA |

Unit 7 | Cos(A+B) |

Unit 8 | Cos2A |

Unit 9 | Sin(A-B) |

Unit 10 | Sin(A+B) |

Unit 11 | Tan(A+B) |