For any two vectors `a` and `b`, if `a.b = 0, |a| = 2 |b| = 1`, then `a xx (a xx (a xx (a xx b)))` is equal to

If a+2b+3c=0, then a xx b+b xx c+c xx a is equal to

If a.b = a.c, a xx b = a xx c then

If theta is the angle between any two vectors vec a and vec b , then |vec a. vec b| = | vec a xx vec b| , when theta is equal to

(a xx b)^(2) + (a.b)^(2) =

If theta is the angle between any two vector vec a and vec b , then |vec a . vec b| = |vec a xx vec b| when theta is equal to