1.

Find the direction cosines of the sides of the triangle whose vertices are (3,5,-4), (-1,1,2) and (-5,-5,-2).

Answer»


Answer :`((-2)/(SQRT(17)),(-2)/(sqrt(17)),(3)/(sqrt(17))),((-2)/(sqrt(17)),(-3)/(sqrt(17)),(-2)/(sqrt(17)))((4)/(sqrt(42)),(5)/(sqrt(42)),(-1)/(sqrt(42)))`


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