What is the derivative of arccos(7/x) ?

The derivative of arccos(7/x) is 7/(xsqrt(x^2-49))

What is the first derivative of arccos(7/x) ?

The first derivative of arccos(7/x) is 7/(xsqrt(x^2-49))

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\frac{d}{d x} (arccos (\frac{7}{x}))

\frac{7}{x x ^{2} - 49}

Solution steps

\frac{d}{d x} (arccos (\frac{7}{x}))

Apply the chain rule:

- \frac{1}{1 - ( \frac{7}{x} ) ^{2}} \frac{d}{d x} (\frac{7}{x})

= - \frac{1}{1 - ( \frac{7}{x} ) ^{2}} \frac{d}{d x} (\frac{7}{x})

\frac{d}{d x} (\frac{7}{x}) = - \frac{7}{x ^{2}}

= - \frac{1}{1 - ( \frac{7}{x} ) ^{2}} (- \frac{7}{x ^{2}})

Simplify

- \frac{1}{1 - ( \frac{7}{x} ) ^{2}} (- \frac{7}{x ^{2}}) : \frac{7}{x x ^{2} - 49}

= \frac{7}{x x ^{2} - 49}

What is the derivative of arccos(7/x) ?
The derivative of arccos(7/x) is 7/(xsqrt(x^2-49))
What is the first derivative of arccos(7/x) ?
The first derivative of arccos(7/x) is 7/(xsqrt(x^2-49))