Question: 23. Given =[1, 7, 9] and, a) Find the angle between =[-2, 5, -3] and w [4, -6,8]. and W. 13 Marks] b) Are

23. Given =[1, 7, 9] and, a) Find the angle between =[-2,

23. Given =[1, 7, 9] and, a) Find the angle between =[-2, 5, -3] and w [4, -6,8]. and W. 13 Marks] b) Are the vectors and and W coplanar? Show your answer algebraically. [3 Marks]

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