E1: Trigonometry

From the DfE Mathematics AS and A-Level Content (LINK):

Radians

E1-15 Trigonometry: Introducing Radians

E1-16 Trigonometry: Converting Between Degrees and Radians

Arc Length

E1-17 Trigonometry: Deriving a Formula for Arc Length in Radians

E1-18 Trigonometry: Using the Formula for Arc Length in Radians

Area of a Sector

E1-19 Trigonometry: Deriving a Formula for Sector Area in Radians

E1-20 Trigonometry: Using the Formula for Area of a Sector in Radians