Posted by laila on .
find a square root of 724i

calculus 
Steve,
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