Respuesta :

The arc length is given as:

[tex]s=r\theta[/tex]

where r is the radius and theta is the angle (in radians). Then we have:

[tex]s=3\cdot\frac{\pi}{4}=\frac{3}{4}\pi[/tex]

therefore the exact arc length is:

[tex]s=\frac{3}{4}\pi[/tex]

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