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Find the length of the curve. r(t) = cos (7t) i + sin (7t)j + 7 ln cos t k, 0 ≤ t ≤ π/4.

Answer» Find the length of the curve. r(t) = cos (7t) i + sin (7t)j + 7 ln cos t k, 0 ≤ t ≤ π/4.

Solution:



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