Homework Statement
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Consider ##\mathbb{R}^3## in standard Cartesian co-ordinates, and the surface ##S^2## embedded within it defined by ##(x^2+y^2+z^2)|_{S^2}=1##. A particular set of co-ords on ##S^2## are defined by
##\zeta = \frac{x}{z-1}##,
##\eta = \frac{y}{z-1}##.
Express...