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 point in the direction of the axes labeled
\(y\) and
\(z\) but opposite the axis labeled
\(x\) is highlighted and labeled as
\(P\text{.}\) A red segment is drawn from the origin to the point
\(P\) and is labeled
\(\rho\text{.}\) A gray segment is drawn parallel to the z-axis from the point
\(P\) to the xy-plane. The gray segment is labeled
\(z\text{.}\) A pink segment is drawn in the xy-plane from the origin to the end of the gray segment. The pink segment is labeled
\(r\text{.}\) A blue circular arc is drawn in the xy-plane from the axis labeled
\(x\) to the pink segment. The blue arc is labeled
\(\theta\text{.}\) A green circular arc is drawn from the axis labeled
\(z\) to the red segment. The green arc is labeled
\(\phi\text{.}\)