If x, y and z Are Three Unit Vectors in Three-Dimensional Space, Then the Minimum Value of |x+y|² + |y+z|² + |z+x|² Is
Given x, y, z are unit vectors in 3D space, find the minimum value of |x+y|²+|y+z|²+|z+x|² by relating the sum to |x+y+z|² and using that a squared magnitude can’t be negative.