Question

If a = 2i+1j-3k and b=3i-1j +2k, then find the angle between the vectors 2a +b and a +2b.
a) cos^-1(36/√42*35)
b)cos^-1(72/√42*32)
​c)cos^-1(52/√74*65)
d)cos^-1(24/√18*32)
I will mark as BRAINLIST who ans this question

Answer 1

Answer:

i Cannot Do this question because i not know how to do

Answer 2

Answer:

I don't know no that this answer is correct or not