Find the principal unit normal vector r(t) = cos 3ti + 2 sin 3tj + k to the curve at the specified value of the parameter t =π.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 78E
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Find the principal unit normal vector r(t) = cos 3ti + 2 sin 3tj + k to the curve at the specified value of the parameter t =π.

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