Grade 12 Calculus. Vectors dot and product. Show your work.

Question 6 (5 points) The vector T is twice as long as the vector S . The angle between the vectors is 120. The vector projection of S on 7 is (2, -1, 7). Determine T .Date .. Page Given 1921 - 2181 .and 0= 120 Soln Projection of S on 7 is given by =[3.JA. 191 12 - 10 We also know that dot product of two vector is given by From eam (2) substituting the value of So we get Projection of 8 Oh , $ 191 18 ( cost ) . as 192 / 2 98 =12118/ So According to question As JE1 = 1281 80 , put Itif in aboveeon . 3 1 18 1 ( 0 5 1 2 0 ) 92 = 2 1 - 7 + 7 k ) 2181 RC = - Q1+ up - 20 k