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 3t)i + (2 sin t)j
A. a = (-9 cos 3t)i + (-4 sin t)j
B. a = (-9 cos 3t)i + (-2 sin t)j
C. a = (9 cos 3t)i + (-2 sin t)j
D. a = (-3 cos 3t)i + (2 sin t)j
Answer: B
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Find the area of the specified region.Inside the circle r = 7 and to the right of the line r = 
sec ?
A. 
(4? - 3
)
B. 
(2? + 3
)
C. 
?
D. 
(2? - 3
)
Give an appropriate answer.Given the function f(x, y, z) and the positive number ? as in the formal definition of a limit, find a positive number ? as in the definition that insures 
< ?.f(x, y, z) = sin2x + sin2y + sin2z ; ? = 0.09
What will be an ideal response?
Find the particular solution to the given differential equation that satisfies the given conditions.Find the solution of the equation 
if 
for 
and 
for 
A. y = b cos ax B. y = 0 C. y = b sin ax + b cos ax D. y = b sin ax
Multiply or divide as indicated. Write the answer in lowest terms.
? 
A. 
B. 
C. 
D. 