§22。 peration of the vectors Magnitude: AxB=ABsin 8 C=AxB Direction: perpendicular to the plan containing the A and B Right hand rule for the direction of the cross product B 密爱B A A 82.2 operation of the vectors o 0is always less than r in ABsin 0 ②A×A=00rB×B=0 ③AxB≠B×A ④A×B=-B×A ⑤A×(B+C)=AXB+A×C 82.3 The Cartesian representation of any vector 1. The Cartesian coordinate system Right handed Cartesian coordinate system4 C A B r r r = × §2.2 operation of the vectors Magnitude: A× B = ABsinθ r r Direction:perpendicular to the plan containing the A B r r and Right hand rule for the direction of the cross product: A r B r A r B r Note: §2.2 operation of the vectors 1 θ is always less than π in ABsin θ 2 3 4 5 A× A = 0 or B× B = 0 r r r r A B B A r r r r × ≠ × A B B A r r r r × = − × A B C A B A C r r r r r r r ×( + ) = × + × §2.3 The Cartesian representation of any vector 1. The Cartesian coordinate system Right handed Cartesian coordinate system: