(1) Find the angle 0 between the following pairs of vectors; (i) ũ = î – 23 + 4k; ở = î + 23 + 3Â (ii) ũ = î + 23 + 3Ê; ở = 2î – } – 2k (iii) ũ = 31 +3 + 2k; ở = 4i – 3) + k

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