Two complete trigonometry lessons that take students from the unit circle to the harmonic form. The Unit Circle and Trig Graphs (17 slides, a 40-question worksheet) builds sin, cos and tan from the unit circle, with exact values, CAST, related angles and equations from 0° to 360°. R cos(θ + α) (12 slides, a 10-question exam-style worksheet) covers finding R and α, maximum and minimum values and solving equations. Both include answer keys with full working and teacher guides, all in A4 and US Letter. Fits GCSE Higher, Cambridge 9709 Pure 3, Edexcel IAL Pure 3 and other A-level Pure courses.