Subjects/Calculus II/Trigonometric integrals/Strategy for ∫sinmxcosnxdxSection 6.4Strategy for ∫sinmxcosnxdxIf m is odd, reserve a factor sinx and use sin2x=1−cos2x; then u=cosx.If n is odd, reserve a factor cosx and use cos2x=1−sin2x; then u=sinx.If both are even, use power-reduction identities.