Question

0. Given that A+ B+C = 0. Two out of the three
vectors are equal in magnitude. The magnitude
of the third vector is 2 times that of the either
out of the other two. Find the angle between
these vectors.
[Ans. 90°, 135, 13591
نام ایران را​

Answer 1

Answer:

A + B + C == 0

Hence A + B == -C

Now as A and B are equal in magnitude and -C is their resultant vector which is root 2 times their magnitude means

A and B represent adjacent sides of square and -C represent their diagonal.

Therefore angle between A and B is 90 degree and angle between A and C or B and C is 270/2== 135 degrees.