Determine the surface area of a sphere of radius "a" by using spherical polar coordinates.
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Explanation:
A=∫π2arccos(hr) ∫2π0 r2sinϕ dθ dϕ
=∫π2arccos(hr) (r2sinϕ)(2π−0) dϕ
=∫π2arccos(hr) 2πr2sinϕ dϕ
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