If `vec(a)` and `vec(b)` are mutually perpendicular unit vectors then `(3vec(a)+2vec(b)).(5vec(a)-
Channel: Doubtnut
Date: 2019-12-29

If `vec(a)` and `vec(b)` are mutually perpendicular unit vectors then `(3vec(a)+2vec(b)).(5vec(a)-6vec(b))=?`