Home/Calculus II/Trigonometric integrals/Product-to-sumSection 6.3Product-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)]View detail →FormulaCopy LaTeXcosAcosB=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)]View detail →FormulaCopy LaTeXsinAcosB=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)]View detail →
FormulaCopy 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)]View detail →
FormulaCopy LaTeXcosAcosB=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)]View detail →
FormulaCopy LaTeXsinAcosB=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)]View detail →