Home > A-Level Maths > Teaching Order Year 2 > 249: Trigonometry - Harmonic Forms 1

E6-09 Equivalent Forms: Writing acosθ + bsinθ in the form rcos(θ±α) or rsin(θ±α)

E6-10 Equivalent Forms: Writing 4cosθ + 3sinθ in the form rsin(θ+ɑ)

E6-11 Equivalent Forms: Writing 3cosθ - 8sinθ in the form rcos(θ+ɑ)

E6-12 Equivalent Forms: Solve 10sinθ - 6cosθ = 5