Compute r''(t).r(t) = (cos 3t)i + (2 sin t)j

A. r''(t) = (-3 cos 3t)i + (2 sin t)j
B. r''(t) = (-9 cos 3t)i + (-4 sin t)j
C. r''(t) = (9 cos 3t)i + (-2 sin t)j
D. r''(t) = (-9 cos 3t)i + (-2 sin t)j


Answer: D

Mathematics

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