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April 18, 2015

April 18, 2015

Posted by **laila** on Thursday, April 12, 2012 at 1:13pm.

- calculus -
**Steve**, Thursday, April 12, 2012 at 3:02pmreferring to a standard 7-24-25 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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