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) = (3 cos t)i + (7 sin t)j
A. a = (3 cos t)i + (7 sin t)j
B. a = (-3 sin t)i + (-7 cos t)j
C. a = (3 sin t)i + (7 cos t)j
D. a = (-3 cos t)i + (-7 sin t)j
Answer: D
Mathematics
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