Inverse Cosine of a Sine

Rarely Tested

Inverse Cosine of a Sine

## Formula

For:

$$x\in\left[-\frac\pi2,\frac\pi2\right]$$

$$\cos^{-1}(\sin x)=\frac\pi2-x$$

## Usage

- Used to simplify inverse cosine applied to sine within the appropriate interval.

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