Solving Complex Number Division: 79 Degrees?

In summary, the conversation is about a student's confusion regarding a question on a test that involves finding the phase angle when dividing two complex numbers. The student initially thought the answer was 45 degrees but the correct answer was 79 degrees. They later realize that the question had a typo and should have been 52 degrees at an angle of 18 degrees. They discuss giving extra points to the person who noticed the mistake and then joke about getting "real" and "imaginary" points. The conversation ends with a reference to a previous thread on Physics Forums.
  • #1
Jason03
161
0
I had a question on a test...and I am trying to figure what is wrong...it seems easy...so what am i missing?

What is the phase angle, in degrees, when you divide 62 at an angle of 97 degrees by 18 at an angle of 52 degrees?

I came up with 45...but the answer said 79?

I thought all you did was subtract...97-52?
 
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  • #2
Jason03 said:
I had a question on a test...and I am trying to figure what is wrong...it seems easy...so what am i missing?

What is the phase angle, in degrees, when you divide 62 at an angle of 97 degrees by 18 at an angle of 52 degrees?

I came up with 45...but the answer said 79?

I thought all you did was subtract...97-52?

Hi Jason03! :smile:

Looks like they meant 52 at an angle of 18 degrees! :rolleyes:
 
  • #3
well than that's a good thing..right?...lol...I need to let my teacher know so I can get the extra points...
 
  • #4
Jason03 said:
I need to let my teacher know so I can get the extra points...
Actually you ought to have your teacher give tiny-tim the extra points. He guessed the fault in the question. :smile:
 
  • #5
complex points

Ouabache said:
Actually you ought to have your teacher give tiny-tim the extra points. He guessed the fault in the question. :smile:

Hi Ouabache! :smile:

Jason03 can have the real points, and I'll have the imaginary points! :wink:
 
  • #6


tiny-tim said:
Hi Ouabache! :smile:

Jason03 can have the real points, and I'll have the imaginary points! :wink:

This is too complex for me. :confused:
 
  • #7
Last edited by a moderator:

FAQ: Solving Complex Number Division: 79 Degrees?

What are complex numbers?

Complex numbers are numbers that consist of both a real part and an imaginary part. They can be written in the form a + bi, where a is the real part and bi is the imaginary part with i being the imaginary unit.

How do you divide complex numbers?

To divide complex numbers, you must first rationalize the denominator by multiplying both the numerator and denominator by the conjugate of the denominator. Then, you can simplify the resulting expression by combining like terms.

What is the process for solving complex number division with an angle of 79 degrees?

The process for solving complex number division with an angle of 79 degrees is the same as for any other complex number division. You must first convert the angle to radians, then use the formula (a + bi) / (c + di) = [(ac + bd) + (bc - ad)i] / (c^2 + d^2) to divide the complex numbers.

Can complex number division result in a real number?

Yes, complex number division can result in a real number if the imaginary parts of both complex numbers are equal, resulting in their cancellation.

Are there any restrictions when dividing complex numbers?

Yes, the only restriction when dividing complex numbers is that the denominator cannot be equal to 0, as division by 0 is undefined.

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