EXAMPLE 9 Find the tangent plane to the surface with parametric equations x = u2, y = v2, z = u + 2v at the point (1, 1, 3).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
Problem 32E
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EXAMPLE 9 Find the tangent plane to the surface with parametric equations x = u?, y = v?, z = u + 2v at the
point (1, 1, 3).
SOLUTION We first compute the tangent vectors:
əx; + BYj +
az K
%3D
Pu =
au
au
au
az K
əx¡ + ÖYj
+
av
av
av
Thus a normal vector to the tangent plane is
i
k
ru x ry = 2u
2v
1.
2
Notice that the point (1, 1, 3) corresponds to the parametric values u = 1 and v = 1, so the normal vector there is
Therefore an equation of the tangent plane at (1, 1, 3) is
Transcribed Image Text:EXAMPLE 9 Find the tangent plane to the surface with parametric equations x = u?, y = v?, z = u + 2v at the point (1, 1, 3). SOLUTION We first compute the tangent vectors: əx; + BYj + az K %3D Pu = au au au az K əx¡ + ÖYj + av av av Thus a normal vector to the tangent plane is i k ru x ry = 2u 2v 1. 2 Notice that the point (1, 1, 3) corresponds to the parametric values u = 1 and v = 1, so the normal vector there is Therefore an equation of the tangent plane at (1, 1, 3) is
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