@ -39,8 +39,8 @@
\[
r = |x| \\
\phi = arctan(y/x) \\
\theta = arctan\left(\frac{\sqrt{x^2+y^2}}{z}\right)
\phi = \arctan(y/x) \\
\theta = \arctan\left(\frac{\sqrt{x^2+y^2}}{z}\right)
\]
</p>