Thus, the ratio is $ \boxed{\frac{\pi}{6}} $.Question: A plant biologist is modeling the growth pattern of a genetically modified crop using the function $ f(t) = A \cos(\omega t + \phi) $, where $ t $ represents time in days. If the maximum rate of change of growth occurs at $ t = \frac{\pi}{4\omega} $ and equals $ 5A\omega $, find the value of $ A $ given that $ \cos(\phi) = \frac{3}{5} $ and $ \sin(\phi) = \frac{4}{5} $.

Fri, 01 May 2026 18:24:27 +0000

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