Subjects/Calculus II/Product-to-sum/Formula6.3. Product-to-sumFormulaIn 6.3. Product-to-sumFormulaCopy LaTeXcosAcosB=21[cos(A−B)+cos(A+B)]Related formulasRelatedFormulasinAsinB=21[cos(A−B)−cos(A+B)]Open formulaOpen in sectionRelatedFormulasinAcosB=21[sin(A+B)+sin(A−B)]Open formulaOpen in section