Find the direction cosines of the vector (4,-8,-8) 8 8 O cosa = 4 12 cosß cosy= 12 12 8 cosa = √12 cosa = cosa = cosa = O 4 √12 4 √20 4 √15 8 cosp 15 = cosß cosß cosß = - = 8 √20 8 √15 cosy 8 15 cosy cosy = 2 cosy = 8 12 8 4 8 √20 15

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