This photo includes two problem solve them seprately Use jus

Use just the vector identities in Exercise 1.1 to show that (A Times B) . (C Times D) = (A . C)(B . D) - (A . D)(B . C) Let A = 8i + 9j + 12k, B = 9i + 6j + k, and C = 3i + 5j + 10k. Calculate the (scalar) projection C_AB of C onto the plane of A and B. Sec illustration below.

Solution

Question is incomplete as there is no exercise 1.1