Question

Let ABCD is a parallelogram where A=(1,2,4),B=(8,7,9) and D=(6,1,5). Find direction cosines of line AC.

Answer 1

ut the position vector of B is 5i^+0j^- 2k^. 11λ+1λ+1 = 5, 3λ-2λ+1 = 0 , 7λ- 8λ+1 =-2⇒11λ+1 = 5λ+5, 3λ-2 =0, 7λ- 8 =-2λ-2⇒ 6λ = 4, 3λ = 2, 9λ = 6 ...

Answer 2

Answer:

hope this will help you.

Thank you