Subjects/Calculus II/Trigonometric integrals/Product-to-sumSection 6.3Product-to-sumFormulaCopy LaTeXsinAsinB=21[cos(A−B)−cos(A+B)]View detail →FormulaCopy LaTeXcosAcosB=21[cos(A−B)+cos(A+B)]View detail →FormulaCopy LaTeXsinAcosB=21[sin(A+B)+sin(A−B)]View detail →