3. The principal normal vector field is defined by : (a) T¹ (s) (b) r(t) |r' (t) (c) |T'(s)| |T'(s)| 4. If r(t) = (cos3t, sin3t, 0), the length of r is : (a)3t (b)2t (c)0
3. The principal normal vector field is defined by : (a) T¹ (s) (b) r(t) |r' (t) (c) |T'(s)| |T'(s)| 4. If r(t) = (cos3t, sin3t, 0), the length of r is : (a)3t (b)2t (c)0
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Choose the correct answer and with explanation of the solution
Transcribed Image Text:(c) T'(s)\
3. The principal normal vector field is defined by :
T'(s)
(a) T¹ (s)\
T'(s)|
(b) r(t)
|r' (t)|
4. If r(t) = (cos3t, sin3t, 0), the length of r is:
(b)2t (c)0
(a)3t
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