But the graphical construction was perfectly clear to him he made an ornamental tiling showing a picture of the curve in his home in Turin.
2.
The name " exsecant " can be understood from a graphical construction of the various trigonometric functions from a unit circle, such as was used historically . sec ( " ? " ) is the secant line, and the exsecant is the portion of this secant that lies " exterior " to the circle ( " ex " is Latin for " out of " ).
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