tan−1(5/3)\tan ^{-1}(5 / 3)tan−1(5/3)
tan−1(3/5)\tan ^{-1}(3 / 5)tan−1(3/5)
sin−1(3/5)\sin ^{-1}(3 / 5)sin−1(3/5)
sin−1(5/3)\sin ^{-1}(5 / 3)sin−1(5/3)