What is the derivative of $f (x) = cos (ln (x)) + sin (ln (x))$ $f(x) = cos(ln(x))+sin(ln(x))$ ?

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Answer 1 · 2015-11-18T22:40:46

It is

$d \frac{f (x)}{d x} = \frac{cos (ln x) - sin (ln x)}{x}$ $df(x)/dx=(cos(lnx)-sin(lnx))/x$

What is the derivative of f(x)=cos(ln(x))+sin(ln(x))f(x) = cos(ln(x))+sin(ln(x))?