Question

if A=4i+3j-2k and B= 8i+4j-4k the angle is​

Answer 1

A= 4i+3j-2k

B = 8i+4j-4k

multiplying A by 2

A= 8i+6j-4k

B= 8i+4j-4k

_-------------------on substraction

A-B = 2j

now

put value of A And B

8i