The resultant of two vectors u and v is perpendicular to u and it's magnitude is half of magnitude of vector v, the angle between u and v in degrees is:
120
60
90
150

Question

The resultant of two vectors u and v is perpendicular to u and it's magnitude is half of magnitude of vector v, the angle between u and v in degrees is:
120
60
90
150

shamim · Answer

Can u draw it ?

shamim · Answer

I wanna solve this problem by parallelogram law of vector addition

isaidavila · Answer

You have to do it by the sine law
V/sin90=(v/2)/sin@
Sin@=1/2
@=30
Since it is a parallelogram opposite angles are equal
90+60= 150
Don't know how can I put an image here so I make the best describing you the solution

vincent-lyon.fr · Answer

As @shamim said, a drawing is the right way to tackle the problem.