railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Vector Calculus Curvilinear Coordinates
Which of the following spherical coordinates (r, θ, Ø) are NOT related to the Cartesian coordinates (x, y, z)?
1
r = \(\sqrt{x^{2}+y^{2}+ z^{2}}\)
2
σ = tan−1\(\left(\frac{y}{x}\right)\)
3
∅ = cos−1\(\left(\frac{z}{r}\right)\)
4
∅ = \(\frac{z}{r}\)