# Derivatives of Inverse Trigonometric Functions

Finding derivatives of inverse trig functions will be similar to finding the derivative of *ln* x. Our main tool is the chain rule. We also need some background information:

- the fact that composing inverse functions gets us back where we started.

- the Pythagorean Theorem

- SOHCAHTOA

Here is a recap video of Pythagorean Theorem.

Here is a recap video on SOHCAHTOA.

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