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import math def radical(a, b, k): return (1-((a**2-b**2)/a**2)*(math.sin(3.141592653589793*(2*k-1)/180))**2)**.5 def f(a, b): sigma = 0 for k in range(1,180/4 + 1): sigma = sigma + radical(a, b, k) return 8*a*math.sin(math.pi/180)*sigma print f(25.,35.)
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