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Differentiate the function. f(x) = ln(25 sin^2(x))

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Use the chain rule.
Let u = 25sin²(x), such that dy/dx = dy/du · du/dx


(dy)/(dx) = (1)/(25sin^(2)(x)) \cdot 50cos(x) \cdot sin(x)

(dy)/(dx) = (2cos(x) sin(x))/(sin^(2)(x))


(dy)/(dx) = 2cot(x)
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