sin−1(6/5)\sin ^{-1}(6 / 5)sin−1(6/5)
sin−1(3/5)\sin ^{-1}(3 / 5)sin−1(3/5)
2sin−1⋅(3/5)2 \sin ^{-1} \cdot(3 / 5)2sin−1⋅(3/5)
tan−165\tan ^{-1} \frac{6}{5}tan−156