©G Dear2008 – Not to be sold/Free to use Mathematic (Preliminary) Trigonometry Trigonometric Ratios Stage 6 - Year 11 Press Ctrl-A ©G Dear2008 – Not to be sold/Free to use

Trigonometric Ratios Opposite Sin φ = Hypotenuse Adjacent Cos φ = θ Adjacent Opposite O A Opposite Hypotenuse Sin φ = Adjacent Hypotenuse Cos φ = Adjacent Hypotenuse Tan φ =

Trigonometric Ratios - Example H = φ 13 O = A = 5 θ O = A = 12 5 13 O H 12 13 Sin θ = O H Sin φ = 12 13 A H 5 13 Cos θ = Cos φ = A H 5 12 A 12 5 A Tan θ = Tan φ =