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

A vector which makes equal angles with the vectors is -...are there non coplanar unit vectors. is inclined at an angle α to the plane of and and are equally inclined at an a...If G and G′ be centroids of triangles ABC and A′B′C′. Then + + is equal to -...Foe non-zero vectors a, b, c | holds, if and only if...If is a constant vector then -...