Question

Prove that

tan^-1(yz/xr) + tan^-1(xz/yr) + tan^-1(xy/(zr) = π/2 where x² + y² + z² = r².

Answer 1

We have

tan^-1(yz/xr) + tan^-1(xz/yr) + tan^-1(xy/(zr) = π/2

Comments

could you tell me how u got tan^-1[(yz/xr+zx//yr+xy/zr_xyz?r^3)/(1-((x^2+y^2+z^2)/r^2)

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i.e your first step in ur answer