早知文理百科

解∫xarcsinxdx =1/2*∫arcsinxdx^2 =1/2*x^2*arcsinx-1/2∫x^2darcsinx =1/2*x^2*arcsinx-1/2∫x^2/√(1-x^2)dx 令x=sint，那么， ∫x^2/√(1-x^2)dx =∫(sint)^2/c...