Find the Exact Value arccos(-( square root of 2)/2)

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Trigonometry

$\cos^{-1} (- \frac{\sqrt{2}}{2})$

The exact value of $\cos^{-1} (- \frac{\sqrt{2}}{2})$ is $\frac{3 π}{4}$ .

$\frac{3 π}{4}$

The result can be shown in multiple forms.

Exact Form:

$\frac{3 π}{4}$

Decimal Form:

$2.35619449 \dots$

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