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oomath
Answers (1)
use cross product to get one side (n1) n1= 2,0,0 x 1,1,7 = 0,-14, 2 use cross product to get another side (n2) n2 = 0,2,0 x 1,1,7 = 14,0,-2 cos theta = (n1 x n2) / sqrt(sum of n1square) x sqrt(sum of n2 squares -4 / sqrt(196+4) x sqrt(196+4) -4/200 cos
