Question: Given points A(10, 12,-6), B(16, 8,-2), C(8, 1,-4), and D(-2,-5, 8), the angle * between R_DA and R_DC in degree is equal to a)

Given points A(10, 12,-6), B(16, 8,-2), C(8, 1,-4), and D(-2,-5, 8), the

Given points A(10, 12,-6), B(16, 8,-2), C(8, 1,-4), and D(-2,-5, 8), the angle * between R_DA and R_DC in degree is equal to a) 21.67 O b) 30.22 O c) 15.47 O d) 55.86 O

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