Find the unit tangent vector T and the principal unit normal vector N for the following IT| IN| = 1 and T N=0. %3D r(t) = (15 cos t,15 sin t)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 100E
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6. Find the unit tangent vector T and the principal unit normal vector N for the following parameterized curve. Verify that
TI IN| = 1 and T N 0.
r(t) = (15 cos t,15 sin t)
The unit tangent vector is T= (
The principal unit normal vector is N =
Find the magnitude of T.
|T| =
(Simplify your answer.)
Find the magnitude of N.
IN =
(Simplify your answer.)
%3D
Compute the dot product of T and N.
T N=
(Simplify your answer.)
7. Find all critical points of the following function.
4
f(x,y) = 4xy+x+y
What are the critical points? Select the correct choice below and, if necessary, fill in the answer box within your choice.
O A. The critical point(s) is/are
(Type an ordered pair. Use a comma to separate answers as needed.)
O B. There are no critical points.
Transcribed Image Text:6. Find the unit tangent vector T and the principal unit normal vector N for the following parameterized curve. Verify that TI IN| = 1 and T N 0. r(t) = (15 cos t,15 sin t) The unit tangent vector is T= ( The principal unit normal vector is N = Find the magnitude of T. |T| = (Simplify your answer.) Find the magnitude of N. IN = (Simplify your answer.) %3D Compute the dot product of T and N. T N= (Simplify your answer.) 7. Find all critical points of the following function. 4 f(x,y) = 4xy+x+y What are the critical points? Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The critical point(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.) O B. There are no critical points.
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