Trigonometric functions

Radian measure and arc length, Sine and cosine on the unit circle: special angles, Reference angles and signs in each quadrant, Sinusoidal graphs: amplitude, period, midline, Phase shift and sinusoidal models, Tangent and the reciprocal trigonometric functions, The Pythagorean identity and simplifying, Right-triangle trigonometry, Inverse trigonometric functions, Solve sin x = c, cos x = c and tan x = c, Solve trigonometric equations by factoring, Equations with a multiple angle, Sum and difference identities, Double-angle identities, Solve equations with identities