# Convert equation from cartesian to spherical

 Math Emeritus Sci Advisor Thanks PF Gold P: 39,568 in other words, "y= x" in spherical coordinates reduces to the set of points where t= $\theta= \pi/4$, r= $\phi$ and p= $\rho$ can be anything. Do you see that that is, in fact, the same as the plane y= x?