Mathematics

Mathematics

Problem

For the function f(x)=ln⁡x−cos⁡xf(x)=\ln x-\cos x, at which of the following values of xx does the graph of ff have a horizontal tangent line? a) x≈2.09x\approx2.09 b) x≈3.45x\approx3.45 c) x≈1.57x\approx1.57 d) x≈1.12x\approx1.12

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