Rewrite −1 + 2i in polar form.

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asked Oct 27, 2019 12.9k views

1 Answer

Sander Bollen · Answer 1 · 2019-11-01T19:20:26+0000

The length of the radius would sqrt(1+4), or sqrt(5).
2
The angle would be in Quadrant II and would be arctan ------ , or arctan (-2).
-1

Find this angle using a calculator or table.

Then you end up with -1+2i = sqrt(5) angle arctan(-2). The angle would be + and measured from the + horizontal axis.

Rewrite −1 + 2i in polar form.

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