title

Question

+8

1120

7

+3693

Here are the answer options:

A. 2(cos90º + i sin90º)

B. 2√2(cos150º + i sin150º)

C. 2(cos7 ${\mathtt{\pi}}$ /4 + i sin7 ${\mathtt{\pi}}$ /4)

D. 2√2(cos7 ${\mathtt{\pi}}$ /4 + i sin 7 ${\mathtt{\pi}}$ /4)

i think its either C or D but im not sure. Thanks guys! ;)

BrittanyJ Apr 30, 2015

+3693

+13

Best Answer

omg, melody!!! thanks! u once again saved my life! LOL

BrittanyJ Apr 30, 2015

BrittanyJ · Answer 1 · 2015-04-30T03:34:01

omg, melody!!! thanks! u once again saved my life! LOL

Michael14 · Answer 2 · 2015-04-30T03:30:56

D**N! i have no clue brah

BrittanyJ · Answer 3 · 2015-04-30T03:31:28

ikr. this one's tough. ive been working on it for about an hour. :/

Melody · Answer 4 · 2015-04-30T03:32:51

The angle is anti-clockwise from the positive x axis so that is 7pi/4

The distance out the front is from the origin so it is $\sqrt{4+4}=\sqrt{8}=2\sqrt2$

so the answer is D

Dbg4thebest · Answer 5 · 2015-04-30T04:00:35

I tried to help u, but al these people had helped u...

BrittanyJ · Answer 6 · 2015-04-30T04:06:04

thanx for trying to help anyway! Melody has had so much experience with all sorts of math problems. so it doesnt take her long! lol

Dbg4thebest · Answer 7 · 2015-04-30T04:11:03

Ur welcome