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The limit as \(x\) approaches \(\pi/4\) is the derivative of \(\cos x\) at \(\pi/4\), written in the \(x \to c\) difference-quotient form rather than the usual \(h \to 0\) form. Once you match \(f(x)=\cos x\) and \(c=...
Unknown · 0:00
The limit as \(x\) approaches \(\pi/4\) is the derivative of \(\cos x\) at \(\pi/4\), written in the \(x \to c\) difference-quotient form rather than the usual \(h \to 0\) form. Once you match \(f(x)=\cos x\) and \(c=...
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