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Find the direction cosines and direction angles of the vector. (Give the direction angles correct to the nearest tenth of a degree.) 2i - j - 4k cos(a) = cos(B) = cos(Y) = a = B =Find the acute angle between the lines. Round your answer to the nearest degree. 4x - V = 3, 2x+ y = 6 OFind the angle between the vectors. (First find an exact expression and then approximate to the nearest degree.) u = (2, 5), v = (6, 1) exact X approximate OFind the angle between the vectors. (First find an exact expression and then approximate to the nearest degree.) a = 6i - 4j + k, b = 8i - k exact approximate