Lagrange identity: If two vector `veca; vecb` are any two vectors `|vecaxx vecb|^2 =( |veca|^2
Channel: Doubtnut
Date: 2020-01-19

Lagrange identity: If two vector `veca; vecb` are any two vectors `|vecaxx vecb|^2 =( |veca|^2 |vecb|^2 - (veca . vecb)^2)`