Consider the spiral curves given parametrically by x(t) sin t tr where r > 0. 5.a Using that x' (t) = y(t) = t cost r sin t cos t tr and y' (t) " = t> 3 t sint + r cos t tr+1 tr+1 set up and simplify an (improper) integral that computes the arclength of these spirals. The integral will depend on r. 5.b For which r > 0 does this spiral have finite length? 5.c Compute the length of the spiral when r = 3.
Consider the spiral curves given parametrically by x(t) sin t tr where r > 0. 5.a Using that x' (t) = y(t) = t cost r sin t cos t tr and y' (t) " = t> 3 t sint + r cos t tr+1 tr+1 set up and simplify an (improper) integral that computes the arclength of these spirals. The integral will depend on r. 5.b For which r > 0 does this spiral have finite length? 5.c Compute the length of the spiral when r = 3.
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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
Transcribed Image Text:Consider the spiral curves given parametrically by
x(t)
sin t
tr
where r > 0.
5.a Using that
x' (t) =
y(t) =
t cost r sin t
cos t
tr
and y' (t)
"
=
t> 3
t sint + r cos t
tr+1
tr+1
set up and simplify an (improper) integral that computes the arclength of these spirals.
The integral will depend on r.
5.b For which r > 0 does this spiral have finite length?
5.c Compute the length of the spiral when r = 3.
(s)
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