Skip to main content\(\newcommand{\R}{\mathbb{R}}
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A three dimensional plot with axes labeled
\(x\text{,}\) \(y\text{,}\) and
\(z\text{.}\) A cone extends in the direction opposite of the axis labeled
\(z\) is plotted in light blue. A green circular arc is drawn from the z-axis to the cone and is labeled
\(\phi \approx 125.27^\circ\text{.}\)