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Find r(t) for the given conditions. r''(t) = −7 cos(t)j − 3 sin(t)k,     r'(0) = 3k,     r(0) =...

Find r(t) for the given conditions.

r''(t) = −7 cos(t)j − 3 sin(t)k,     r'(0) = 3k,     r(0) = 7j

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