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Principal Value of $$\tan^{-1}(-1)$$
## Formula
$$\tan^{-1}(-1)=-\frac\pi4$$
## Usage
- Used for direct evaluation of standard inverse tangent values.
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Principal Value of $$\tan^{-1}(-1)$$
## Formula
$$\tan^{-1}(-1)=-\frac\pi4$$
## Usage
- Used for direct evaluation of standard inverse tangent values.
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