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

Which of the following is unit vectors-...If angle between vector and lies between π/2 and 3π/4, then -...The three vectors taken two at a time form three planes, The three unit vectors drawn perpendicular to these planes form...[ ] will not be zero when-...If the vectors = î + aĵ + a2, = î + bĵ + b2, = î + cĵ + c2 are three non-coplanar vectors ...