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Mathematics
Mathematics
Problem
Calculate the unit tangent vector to the curve
r
(
t
)
=
⟨
3
t
,
4
t
,
0
⟩
\mathbf r(t)=\langle 3t,\,4t,\,0\rangle
r
(
t
)
=
⟨
3
t
,
4
t
,
0
⟩
at
t
=
1
t=1
t
=
1
.
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