sin−1(23)\sin ^{-1}\left(\sqrt{\dfrac{2}{3}}\right)sin−1(32)
sin−1(23)\sin ^{-1}\left(\dfrac{\sqrt{2}}{3}\right)sin−1(32)
sin−1(23)\sin ^{-1}\left(\dfrac{2}{\sqrt{3}}\right)sin−1(32)
sin−1(13)\sin ^{-1}\left(\dfrac{1}{\sqrt{3}}\right)sin−1(31)