Question

If `vec(A)` and `vec(B)` denote the sides of a parallelogram and its area is AB/2 , the angle between `vec(A)` and `vec(B)` is :-
A. `(pi)/(2)`
B. `pi`
C. `(pi)/(6)`
D. `(pi)/(3)`

Answer 1

Correct Answer - C
`|vec(A)xxvec(B)| =|AB sin theta|`
`(AB)/(2)=AB sin theta`
`rArr sin theta=(1)/(2)`
` rArr theta=60^(@)`