If the magnitude of two vectors are 4 unit and 6 unit and magnitude of their scalar product is 12√2 unit. What is the angle between the vectors?
If vectors A⃗=i^−3j^+5k^\vec{A}=\hat{i}-3\hat{j}+5\hat{k}A=i^−3j^+5k^ and B⃗=7i^+2j^−xk^\vec{B}=7\hat{i}+2\hat{j}-x\hat{k}B=7i^+2j^−xk^ are perpendicular to each other, then the value of xxx is