E 1. If A=x+3y-22 and B-4-2y+42, find: i. AB 3A+2B v. (2A+B)(A-2B) 2. Find the acute angle between: 1. 4=3x+2 62 and B-4x-3y+2 111. B IV. C=4x-2y+42 and D=3-60-22. 3. For which values of p are the following vectors perpendicular to each other. 4. 5. 6. 11 A = px-2y+ and B=2px + py-42 A=2x+py + and B-4x-20-22 Show that the vectors: A=3x-2+2, B=x-3y+52 and C=2x+y-4 form a right angled triangle. Find the angle which the vector A-3x-6y+2 makes with the coordinate axis. If 4-38-7-23, B=2x+3v+ determine i B (A-28)x(2A-B)