S3 – Adding & Subtracting Surds

S3 – Simplifying Surds

S3: Surds

Standard Deviation

Standard Deviation – Explained and Visualised

How to calculate Standard Deviation and Variance

Standard Deviation

Area of triangles – Sin Rule

The Sine Rule – Finding a Missing Angle

The Sine Rule – Finding a Missing Side

The Sine Rule – Note

The Cosine Rule – Finding a Missing Side

The Cosine Rule – Finding a Missing Angle

Introduction to Vectors