If x = r sin θ cos ϕ, y = r sin θ sin ϕ and z = r cos θ, then(a) x2+y2+z2=r2(b) x2+y2-z2=r2(c) x2-y2+z2=r2(d) z2+y2-x2=r2

If x = r sin θ cos ϕ, y = r sin θ sin ϕ and z = r cos θ, then(a)

1.	If x = r sin θ cos ϕ, y = r sin θ sin ϕ and z = r cos θ, then(a) x2+y2+z2=r2(b) x2+y2-z2=r2(c) x2-y2+z2=r2(d) z2+y2-x2=r2
Answer» If x = r sin θ cos ϕ, y = r sin θ sin ϕ and z = r cos θ, then (a) $x^{2} + y^{2} + z^{2} = r^{2}$ (b) $x^{2} + y^{2} - z^{2} = r^{2}$ (c) $x^{2} - y^{2} + z^{2} = r^{2}$ (d) $z^{2} + y^{2} - x^{2} = r^{2}$

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If x = r sin θ cos ϕ, y = r sin θ sin ϕ and z = r cos θ, then(a) x2+y2+z2=r2(b) x2+y2-z2=r2(c) x2-y2+z2=r2(d) z2+y2-x2=r2

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