Measuring angles in radians, circumference & arc lengths and sector areas

Sine, cosine & tangent functions in the unit circle

Graphs, domain, and range of sinx and cosx, general sinusoidal functions, modeling periodic phenomena, tanx and reciprocal trig functions, inverse trig functions

The functions secx, cosecx and cotx, domain, range & graphs

Solving equations involving trigonometric functions and understanding solution domains

Applications of trigonometric identities such as sin2θ+cos2θ=1, sin2θ=2sinθcosθ and more identities for HL students