Home
Class 12
MATHS
vec OA and vec BO are two vectors of mag...

`vec OA` and `vec BO` are two vectors of magnitudes 5 and 6 respectively.If `angle (BOA) = 60^(@)`, then `vec (OA) `.`vec(OB)` is equal to

A

0

B

15

C

`-15`

D

`5sqrt3`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

If vec a and vec b are two perpendicular vectors then

Let vec a, vec b and vec c be three vectors having magnitudes 1,1, and 2 respectively. If vec a xx (vec a xx vec c) + vec b = vec 0 , then the angle between vec a and vec c is

Let vec a, vec b and vec c of magnitudes 3,4 and 5 repectively. If vec a is perpendicular to (vec b + vec c), vec b is perpendicular to (vec c + vec a) and vec c is perpendicular to (vec a + vec b) , then the magnitude of vec a + vec b + vec c is

Write the angle between two vectors vec(a) and vec(b) with magnitudes sqrt(3) and 2 respectively having vec(a).vec(b) = sqrt(6) .

The angle between two vectors vec a and vec b with magnitudes sqrt3 and 4, respectively and vec a . vec b = 2 sqrt3 is

If vec(a) and vec(b) are two vectors such that |vec(a) + vec(b)| = |vec(a)| , then prove tat 2vec(a) + vec(b) is perpendicular to vec(b) .

If vec a and vec b are unit vectors and theta is the angle between them, then |vec a + vec b| =

If |vec(a)| = 5, |vec(b)| = 6 and the angle between vec(a) and vec(b) is 60^(@) , then vec(a).vec(b) =