exercise:06b7e017f4

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• Using the integral formula for arc length in polar coordinates, compute the arc length of the polar graph of the equation [math]r=2\sec \theta[/math] from [math]\theta = -\frac\pi4[/math] to [math]\theta=\frac\pi4[/math].
• Identify and draw the curve in part (a), and verify from the geometry the value obtained for the arc length.