Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 311
ns-verse axis AA, rotate about 0into coincidence with Z>i; thenthe conjugate diameter, D, startsfrom coincidence with the con-jugate axis BB, and rotates intocoincidence with D/. But D rotates more quickly than D,*so that the angle from D to D% at first 90°, becomes obtuseand steadily increases.… … FjG. 3 EXERCISES 1. Draw accurately an ellipse whose axes are 10 cm. and7 cm. Construct the axes and the pair of conjugate diametersequally inclined to the axes. Then draw the diameters in- * Since the slope of A is - < 1, ^ ^ OA < 45^ and X B OA > 45° ; a hence D has a smaller angle…
