Question

If `overset(to)(a) , overset(to)(b) " and " overset(to)( c)` are unit coplanar vectors then the scalar triple product `[2 overset(to)(a) - overset(to)(b) 2 overset(to)(b) - overset(to)(c ) 2 overset(to)(c ) - overset(to)(a)]` is

Answer 1

Correct Answer - A
If `vec(a) , vec(b) , vec(c ) ` are coplanar vectors then `2vec(a)-vec(b) ,2vec(b) - vec(c ) ` and `2vec( c) - vec(a) ` are also coplanar vectors.
`I.e., [2vec(a) -vec(b) 2vec(b) -vec(c ) vec(c ) -vec(a)]=0`