Question

Find the acute angles between the intersecting lines in Exercises 49 and 50. 49. x = t, y = 2t, z =-t and x = 1 - t, y = 5 + t, z = 2t

50. x = 2 + t, y = 4t + 2, z = 1 + t and x = 3t - 2, y =-2, z = 2 - 2t

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