Nystrom, John W. (John William), 1824-1885 · Philadelphia, J.B. Lippincott · leaf 128
134. By ordinates and sub chords. t = R cot. W=R tan.w, W=$0—w, S= R (sec.w—1) = R Ccosec. W—1) C=k R. For k, see table of segments. 135. Ellipse by ordinates. 1 = 0-4840(7 5=0-9204(7 2=06616(7 6=0-9682(7 3=0-7808(7 7=0-9922(7 4=0-8660(7 8 = (7 the unit. 136.
Mechanical engineering · Engineering
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-318-34.webp)
