VectorHard

Question

Let and be vectors such that . If and = 5, then is

Options

A.47
B.-25
C.0
D.25

Solution

Since,
⇒    
⇒    
⇒     9 +16 + 25 + 2
⇒    

Create a free account to view solution

View Solution Free
Topic: Vector·Practice all Vector questions

More Vector Questions

The position vector of a point C with respect to B is î + ĵ and that of B with respect to A is î − ...If are unit vectors such that and are perpendicular, then-...The vector which is collinear with the vector = 2î − ĵ and . = 10 is-...If and are three non-coplanar vectors, then equals...If ,, are three non- coplanar vectors and , , are vectors defined as = , = , = then ( + ). + ( + ). + ( + ). equals-...