If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (cos 2t)i + (4 sin t)j
A. a = (-4 cos 2t)i + (-4 sin t)j
B. a = (-4 cos 2t)i + (-16 sin t)j
C. a = (-2 cos 2t)i + (4 sin t)j
D. a = (4 cos 2t)i + (-4 sin t)j
Answer: A
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+ C
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- 
+ C
C. ln 
- 
+ C
D. 
- 3 sec -1 
+ C
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Fill in the blank(s) with the appropriate word(s).
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= 
. Which method did you use to determine whether this proportion is true or false?
What will be an ideal response?