Question

Two vectors a and b are drawn from a common point and c=a+b, then angle between a and b is

Answer 1

Step-by-step explanation:

Under root a square plus b square plus two a b cos theta equal to C

a square + b square + 2 a b cos theta is equal to c square

2a b cos theta is equal to C square minus A square minus b square

cos theta is equal to C square minus A square minus b square whole divided by2 A B

theta is equal to Cos inverse (c square minus A square minus b square) upon 2 a b