What is the derivative of arccos(7x) ?

The derivative of arccos(7x) is -7/(sqrt(1-49x^2))

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

The first derivative of arccos(7x) is -7/(sqrt(1-49x^2))

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

- \frac{7}{1 - 49 x ^{2}}

Solution steps

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

Apply the chain rule:

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

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

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

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

Simplify

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

= - \frac{7}{1 - 49 x ^{2}}

What is the derivative of arccos(7x) ?
The derivative of arccos(7x) is -7/(sqrt(1-49x^2))
What is the first derivative of arccos(7x) ?
The first derivative of arccos(7x) is -7/(sqrt(1-49x^2))