huynh (lth436) – HW07 – meth – (91845)
1
This
print-out
should
have
11
questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001
10.0points
002
10.0points
Find the arc length of the curve
r
(
t
) = (4 +
√
2
t
)
i
+
e
t
j
+ (3 +
e
−
t
)
k
between
r
(0) and
r
(8).
10.0points
Find the unit tangent vector
T
(
t
) to the
graph of the vector function
r
(
t
) =
(
4 sin
t,
+3
t,
−
4 cos
t
)
.