- #1

r-soy

- 173

- 1

-3 - 5i

my answer :

x = -3 y = - 5

r = root (-3)^2 + (-5)^2

= 5.83

tan Q = 5/3 = -1.12

tan-1 -1.12 = -0.84

Q = -0.84

Q = -pi + -0.84 = -3.981

Polar form = 5.83e^(-3.981)i

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- Thread starter r-soy
- Start date

- #1

r-soy

- 173

- 1

-3 - 5i

my answer :

x = -3 y = - 5

r = root (-3)^2 + (-5)^2

= 5.83

tan Q = 5/3 = -1.12

tan-1 -1.12 = -0.84

Q = -0.84

Q = -pi + -0.84 = -3.981

Polar form = 5.83e^(-3.981)i

- #2

ammontgo

- 16

- 0

Ok first off:

I believe you've recorded your answer in exponential form.

Forms of Complex Numbers:

[PLAIN]https://dl.dropbox.com/u/4645835/MATH/ComplexForms.gif [Broken]

Please correct me if I'm wrong.

I believe you've recorded your answer in exponential form.

Forms of Complex Numbers:

[PLAIN]https://dl.dropbox.com/u/4645835/MATH/ComplexForms.gif [Broken]

Please correct me if I'm wrong.

Last edited by a moderator:

- #3

ammontgo

- 16

- 0

I think your angle may be wrong as well. This is what I did:

[PLAIN]https://dl.dropbox.com/u/4645835/MATH/Ex1.gif [Broken]

I can explain why I added 180 degrees to the angle I calculated - if needed.

[PLAIN]https://dl.dropbox.com/u/4645835/MATH/Ex1.gif [Broken]

I can explain why I added 180 degrees to the angle I calculated - if needed.

Last edited by a moderator:

- #4

r-soy

- 173

- 1

but as I know in this question we change calculator to ( Rad ) nor (deg) because we have integer number -3 and - 5 not roots or ,

and please I want explaine more because I don't understand clearly

- #5

Mark44

Mentor

- 36,667

- 8,669

tan Q = 5/3, but 5/3 is not equal to -1.12write in polar form ...elc

-3 - 5i

my answer :

x = -3 y = - 5

r = root (-3)^2 + (-5)^2

= 5.83

tan Q = 5/3 = -1.12

tan-1 -1.12 = -0.84

Q = -0.84

Q = -pi + -0.84 = -3.981

Polar form = 5.83e^(-3.981)i

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