Basic Trigonometric Equations on the Unit Circle

MathematicsTrigonometryAges 16–17

Solve sin x = m, cos x = m, or tan x = m using the unit circle: the simulation marks the terminal points that satisfy the equation, compares them with the function graph, and writes out the full solution family x = α + k2π (or π − α + k2π, α + kπ). Change m to see when the equation has no solution.