Home/Calculus II/Product-to-sum/Formula6.3. Product-to-sumFormulaIn 6.3. Product-to-sumFormulaCopy LaTeXsinAsinB=12[cos(A−B)−cos(A+B)]\sin A\sin B=\frac{1}{2}[\cos(A-B)-\cos(A+B)]sinAsinB=21[cos(A−B)−cos(A+B)]Tagsantiderivativeidentidadintegrals trigonometric product A sumtrigonometricaFound an error? Contact us.Related formulasRelatedFormulasinxcosx=12sin(2x)\sin x\cos x=\frac{1}{2}\sin(2x)sinxcosx=21sin(2x)Open formulaOpen in sectionRelatedFormulacosAcosB=12[cos(A−B)+cos(A+B)]\cos A\cos B=\frac{1}{2}[\cos(A-B)+\cos(A+B)]cosAcosB=21[cos(A−B)+cos(A+B)]Open formulaOpen in sectionRelatedFormulasinAcosB=12[sin(A+B)+sin(A−B)]\sin A\cos B=\frac{1}{2}[\sin(A+B)+\sin(A-B)]sinAcosB=21[sin(A+B)+sin(A−B)]Open formulaOpen in section