Question: Need Help - Will leave good feedback! 20. Determine the angle between a = (5, 3, 0) and b = ( -1, 0, 8) [3

Need Help - Will leave good feedback!

Need Help - Will leave good feedback! 20. Determine the angle between

20. Determine the angle between a = (5, 3, 0) and b = ( -1, 0, 8) [3 Marks] 21. The vertices of a quadrilateral are A = [0, 3,5], B = [-3, -1, 17], C = [4, -3, 15] & D = [7, 1,3]. Prove that ABCD is a parallelogram. [5 Marks] x-1 YZZ= z+1 22. Determine the value of & for which the direction vectors of the lines k 2 k-1 and x+3 -2 T, y = -1 are perpendicular. [4 Marks]

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