Question

The angle between the diagonals of a cube with edges of unit length is 1 {{\sin }^{-1}}\left( 1/3 \right)sin −1 (1/3) 2 {{\cot }^{-1}}\left( 1/3 \right)cot −1 (1/3) 3 {{\tan }^{-1}}\left( 1/3 \right)tan −1 (1/3) 4 {{\cos }^{-1}}\left( 1/3 \right)cos −1 (1/3)

Answer 1

Answer:

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