calculus
posted by laila .
find a square root of 724i

referring to a standard 72425 right triangle,
(x,y) = (7,24)
(r,θ) = (25,π+arctan(24/7)) = (25,4.4286)
square root:
(r,θ) = (5,2.2143)
(x,y) = (3,4)
= 3 + 4i
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