# Higher Level Maths Proofs

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)