PPrecalculus with unit-circle trigonometryPrecalculus with unit-circle trigonometryde Cohen, DavidMateriasFunctionsTrigonometryAlgebraEdiciones (1)Precalculus with unit-circle trigonometryMás obras de Cohen, DavidStudent's solutions manual to accompany Precalculus, a problems-oriented approachPrecalculusPrecalculus