矢量叉乘 1 AxB=AA A BBB B =(A2B3-A3B2)e1+(AB1-AB3)e2+(A1B2-A2B)e3 AxB=ABsin en A×(B+C)=A×B+A×C A×B=-B×A A×A=0➢ 矢量叉乘 1 2 3 1 2 3 1 2 3 2 3 3 2 1 3 1 1 3 2 1 2 2 1 3 ( ) ( ) ( ) e e e A B A A A B B B A B A B e A B A B e A B A B e = = − + − + − A B n A B AB n = sin A B C A B A C + = + ( ) A B B A = − A A = 0