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anonymous
 one year ago
Can someone please help me finish this precalc question???
Express the complex number in trigonometric form.
2  2i
This is what I have so far:
r=absolute value(22i)
r= sqrt((2)^2+(2)^2)
r=sqrt(8)
r=2sqrt(2)
theta(ref)=tan^1*absolute value(2/2)
theta(ref)=pi/2
I dont know how to get the value of theta alone to complete this problem. What do i do next? Please help!
anonymous
 one year ago
Can someone please help me finish this precalc question??? Express the complex number in trigonometric form. 2  2i This is what I have so far: r=absolute value(22i) r= sqrt((2)^2+(2)^2) r=sqrt(8) r=2sqrt(2) theta(ref)=tan^1*absolute value(2/2) theta(ref)=pi/2 I dont know how to get the value of theta alone to complete this problem. What do i do next? Please help!

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[22i\]\[r=\sqrt{2^2+(2)^2}\]\[\tan^{1} = (\frac{ 2 }{ 2 } ) = ?\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you arent suppose to use radian mode for polar form

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thats why you got pi/2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I thought \[\tan^{1} =\frac{ a }{ b }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1439092982007:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0better if i draw it out?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes. After switching it to b/a i got theta(ref)=1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0find out whats tan^1(1)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0tan^1(1) or tan^1(1)? tan^1(1) is 1.55 or tan(1) http://www.wolframalpha.com/input/?i=tan%5E1%281%29

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, yeah tan^1(1) is pi/4 or 45 degrees

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now put that in 360 degrees form

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0find the angle that is coterminal to 45 degrees? Thats 315, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you know how to make the polar form from there right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh wait its trigo form

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yea. I was stuck at theta(ref)= 1. I dont know what to do next

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok great you have the angles now you can form whatever it is

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you should get \(\theta\) instantly from your eyeballs
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