| 2019-03-15 | [spec] corrections in double angle formulas | blob | diff | raw | |
| 2019-03-14 | [spec] compound & double angle formulas | blob | diff | raw | diff to current | |
| 2019-03-13 | [spec] graphics for reciprocal circular functions | blob | diff | raw | diff to current | |
| 2019-03-12 | [spec] reciprocal circular function identities | blob | diff | raw | diff to current | |
| 2019-03-12 | [spec] circular functions (sec & cosec) | blob | diff | raw | diff to current | |