PDF 12 Vectors and the Geometric of Space - Arkansas State University
[Pages:4]12 Vectors and the Geometric of Space
Dr. Jeongho Ahn
Department of Mathematics & Statistics
ASU
Dr. Jeongho Ahn
Jeongho.ahn@csm.astate.edu
Outline of Chapter 12
1 Three-Dimensional Coordinates Systems 2 Vectors 3 The Dot Product 4 The Cross Product 5 Equations of Lines and Planes
Dr. Jeongho Ahn
Jeongho.ahn@csm.astate.edu
12.1 Three-Dimensional Coordinates Systems
The coordinates in a three dimensional system are of the form (x, y , z), called the ordered triple. A point P is located at (x, y , z) P(x, y , z). The Cartesian product R3 = R ? R ? R = {(x, y , z)|x, y , z R}
Example1 Describe the region of R3 represented by the equation or inequality. 1. z = 1 2. x2 + y 2 + z2 4
The Distance between P1 (x1, y1, z1) and P2 (x2, y2, z2) is P1P2 = (x1 - x2)2 + (y1 - y2)2 + (z1 - z2)2.
Example2 Find the distance between P1 (1, 2, 3) and P2(-3, -1, 0).
Dr. Jeongho Ahn
Jeongho.ahn@csm.astate.edu
The Standard Equation for a Sphere with Radius r and Center (x0, y0, z0) is
(x - x0)2 + (y - y0)2 + (z - z0)2 = r 2
Example3 Find the center and radius of the sphere. 1 x2 + y 2 + z2 + 4x - 6z + 3 = 0 2. 2x2 + 2y 2 + 2z2 = -8x + 24y + 2
Dr. Jeongho Ahn
Jeongho.ahn@csm.astate.edu
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