Question

can you please send me the answer please​

Answer 1

Answer:

We know that magnitude of a vector is equal to = ✓of the sum of the vectors

Explanation:

/a+b/ = /a-b/

✓a²+2abcosx+b² = ✓a²-2abcosx+b²

squaring on both sides

the roots get cancelled

a²+b²+2abcosx = a²+b²-2abcosx

2abcosx = -2abcosx

2abcosx + 2abcosx = 0

4abcosx = 0

sending 4ab towards RHS

cosx = 0/4ab

cosx = 0

x =90