Question

guys answer me

ita urgent so answer me quick ​

Answer 1

Answer:

Step-by-step explanation:

a=2i + 2j - k

b=6i - 3j +2k

|a| =root(2^2 + 2^2 + 1^2)

   =root(9)=3

|b|=root(6^2 + 3^2 + 2^2)

   =root(49) = 7

a . b = |a| |b| cos @                       where @ is angle btw vectors

a . b = (2i + 2j - k) . (6i - 3j +2k)

       =12 - 6 -2

       =4

cos@ = a . b / (|a| |b|)

cos @ = 4/(7*3)=4/21

@= cos^-1(4/21)

Hope it's correct and helps you

Answer 2

Answer:

your solution is in image