For any to vectors ` vec A and vec B`, prove that  |vec A xx vec B|^2 = A^2 B^2 - ( vec A. vec B)^2`
Channel: Doubtnut
Date: 2020-07-26

For any to vectors ` vec A and vec B`, prove that  |vec A xx vec B|^2 = A^2 B^2 - ( vec A. vec B)^2`.