Math-Complex: correct typos in documentation

dist/Math-Complex/lib/Math/Trig.pm

@@ -466,15 +466,15 @@ B<All angles are in radians>.
 
 B<Cartesian> coordinates are the usual rectangular I<(x, y, z)>-coordinates.
 
-Spherical coordinates, I<(rho, theta, pi)>, are three-dimensional
+Spherical coordinates, I<(rho, theta, phi)>, are three-dimensional
 coordinates which define a point in three-dimensional space.  They are
 based on a sphere surface.  The radius of the sphere is B<rho>, also
 known as the I<radial> coordinate.  The angle in the I<xy>-plane
 (around the I<z>-axis) is B<theta>, also known as the I<azimuthal>
 coordinate.  The angle from the I<z>-axis is B<phi>, also known as the
-I<polar> coordinate.  The North Pole is therefore I<0, 0, rho>, and
-the Gulf of Guinea (think of the missing big chunk of Africa) I<0,
-pi/2, rho>.  In geographical terms I<phi> is latitude (northward
+I<polar> coordinate.  The North Pole is therefore I<rho, 0, 0>, and
+the Gulf of Guinea (think of the missing big chunk of Africa) I<rho,
+0, pi/2>.  In geographical terms I<phi> is latitude (northward
 positive, southward negative) and I<theta> is longitude (eastward
 positive, westward negative).