1.

If 0<θ,ϕ<π2,x=∞∑n=0cos2nθ,y=∞∑n=0sin2nϕ and z=∞∑n=0cos2nθ⋅sin2nϕ then :

Answer»

If 0<θ,ϕ<π2,x=n=0cos2nθ,y=n=0sin2nϕ and
z=n=0cos2nθsin2nϕ then :



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