Two small typos about page numbers:Please refer to TAJCD volume II, page 111-118, where tangen is looked at in detail, and proved geometrically.
- on page 114 it states "(page 111, top)"; I think this should be "(page 112, top)".
- on page 117 it states "drawing on page 144"; I think this should be "drawing on page 115".
I find page 116 difficult to follow, especially the second paragraph.
I have the impression that the illustrations on pages 115 and 116 are being treated as one illustration (which if the paper was big enough, or the scale small enough they could be).
Could someone explain how to interpret the projection at the right side of page 116 ?
(Which I take to be the illustration referred to as "The view of the board at the right of the illustration ..." )
I feel very pedantic writing this, sorry !
Rob