cosinustheorem.calc

b = 4.00000e+00
c = 2.50000e+00

a = (2.22500e+01) ^ (5.00000e-01)
a = (2.22500e+01) ^ (5.00000e-01) = (2.22500e+01) ^ (5.00000e-01) = 4.71699e+00