Question

answer is zero but how​

Answer 1

Let, A be any vector of magnitude A. And B with magnitude B

So, Magnitude of A+B =√(A²+B²+2ABcosΦ)

and That of A–B=√(A²+B²–2ABcosΦ)

So, the resultant of (A+B) and (A–B) will be given by the vector A

Answer 2

Answer:

d

Explanation:

As you can see angle btw A and resultant R is 0