Home/Calculus II/Double-angle and power-reduction identities/Formula6.2. Double-angle and power-reduction identitiesFormulaIn 6.2. Double-angle and power-reduction identitiesFormulaCopy LaTeXcos2x=1+cos(2x)2\cos^2x=\frac{1+\cos(2x)}{2}cos2x=21+cos(2x)Tagsantiderivativeidentidadintegrals trigonometric identities of angle double and reduction of powertrigonometricaVariablesxxxVariable independiente (variable de integración)Found an error? Contact us.Related formulasRelatedFormulasin2x=1−cos(2x)2\sin^2x=\frac{1-\cos(2x)}{2}sin2x=21−cos(2x)Open formulaOpen in sectionRelatedFormulasinxcosx=12sin(2x)\sin x\cos x=\frac{1}{2}\sin(2x)sinxcosx=21sin(2x)Open formulaOpen in sectionRelatedFormulasin(2x)=2sinxcosx\sin(2x)=2\sin x\cos xsin(2x)=2sinxcosxOpen formulaOpen in section