Question

5. If ā,b,c are unit vectors and 5, are non collinear vectors satisfying.
b + c
(a,b)=0,(2,5)=B and āx(5 x
)=
then cos(a+b)=
2
1
1) 0
2) 1
3) -1
4)
2​

Answer 1

Step-by-step explanation:

1. follow kar mujhe theek hai na bus
2. like kar de