Question

Question #9451d

Answer 1

Given that the vectors have same length, it is meant that they have same magnitude. Let this be a and angle between them is `theta`. By the problem the resultant of the two being twice of either i.e. 2a, we can write

`(2a)^2=a^2+a^2+2xxaxxacostheta`

`=>costheta=1=>theta =0^@`