Osgood, William F. (William Fogg), 1864-1943, Graustein, William C. (William Caspar), 1888-1941, joint author · New York : The Macmillan Company · leaf 494
tion (9), for example(10) a;2 +22 = ^2 ^2_2^2^o. THE STRAIGHT LINE 475 The surface (9) consists of the two planes, passing through the z-axis andbisecting the angles betweenthe (y, z)- and (z, a;)-planes.Each of these planes intersectseither cylinder in an ellipse ; cf.Ch. XII, § 6.… … Fig. 3 EXERCISES In each of the following exercises determine what the givenequations, considered simultaneously, represent. Draw afigure. 2. ic = 4, 2/ = 0. 4. 2?/+3 = 0,3:2-5=0. 6. 3 a; -f- 2 2/ = 0, 2; - 4 = 0. 8. ic — 2/ = 0, X — 2 = 0. 10. x = ^y = z. 1. 2/ = 0, 2; = 0. 3. a; + 4 = 0, ;? - 3 =…
