Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
i + 
j + 3tk
A. T = 
(cos 0.8t)i - 
(sin 0.8t)j ; N = (-sin 0.8t)i - (cos 0.8t)j
B. T = 
(cos 0.8t)i - 
(sin 0.8t)j + 
k ; N = (-sin 0.8t)i - (cos 0.8t)j
C. T = 
(sin 0.8t)i - 
(cos 0.8t)j ; N = (-sin 0.8t)i - (cos 0.8t)j
D. T = 
(cos 0.8t)i - 
(sin 0.8t)j + 
k ; N = (-sin 0.8t)i - (cos 0.8t)j
Answer: D
You might also like to view...
Which of the following can be determined to be true, given the following: A - B> C, where A, B, and C are natural numbers? ?
A.
?
< 1
B.
?
C.
?
> 1
D.
?
< 1
E.
?
Evaluate the surface integral of G over the surface S.S is the plane x + y + z = 4 above the rectangle 0 ? x? 1 and 0 ? y ? 3; G(x,y,z) = 2z
A. 12
B. -18
C. 30
D. 18
Solve the problem.Within a group of n people, the number of possible handshakes, N, is given by 
How many handshakes are possible at a meeting if 24 people are present?
A. 552 handshakes B. 276 handshakes C. 264 handshakes D. 300 handshakes
Verify the identity.
- 
= 4 cot ? csc ?
What will be an ideal response?