Question: Consider the points A, B, C, D where coordinates are respectively (1, 1, 0), (-1, 1, 0), (1,-1, 0), (0, -1, 1). Find the

Consider the points A, B, C, D where coordinates are respectively (1,

Consider the points A, B, C, D where coordinates are respectively (1, 1, 0), (-1, 1, 0), (1,-1, 0), (0, -1, 1). Find the direction cosines of AC and BD and calculate the angle between them.

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