Derivative of a Composite Inverse Cosine

Rarely Tested

Derivative of a Composite Inverse Cosine

For:

$$y=\cos^{-1}u(x)$$

$$\frac{dy}{dx}=-\frac{u'(x)}{\sqrt{1-u^2(x)}}$$

Usage

- Used when the argument of inverse cosine is a function of $$x$$.

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