FP1 Complex numbers (argument) query

Watch
Youngey4
Badges: 1
Rep:
?
#1
Report Thread starter 4 years ago
#1
Should I express the argument of a complex number in radians or degrees? My teacher said it should always be in radians but a past exam question refers to the answer in degrees.
Many thanks.
0
reply
dnr_23
Badges: 9
Rep:
?
#2
Report 4 years ago
#2
(Original post by Youngey4)
Should I express the argument of a complex number in radians or degrees? My teacher said it should always be in radians but a past exam question refers to the answer in degrees.
Many thanks.
usually radians, unless the question says degrees lol

just read the question
0
reply
Youngey4
Badges: 1
Rep:
?
#3
Report Thread starter 4 years ago
#3
(Original post by dnr_23)
usually radians, unless the question says degrees lol

just read the question
Ok thanks. The question I was doing didn't specify and it said give A0 for radians
0
reply
dnr_23
Badges: 9
Rep:
?
#4
Report 4 years ago
#4
(Original post by Youngey4)
Ok thanks. The question I was doing didn't specify and it said give A0 for radians
oh i seee thats so bad of them not to specify?!
0
reply
Chittesh14
Badges: 19
Rep:
?
#5
Report 4 years ago
#5
(Original post by Youngey4)
Ok thanks. The question I was doing didn't specify and it said give A0 for radians
Post a picture of the question please. That's so sad, people could lose marks.
0
reply
crashMATHS
Badges: 16
Rep:
?
#6
Report 4 years ago
#6
(Original post by Youngey4)
Should I express the argument of a complex number in radians or degrees? My teacher said it should always be in radians but a past exam question refers to the answer in degrees.
Many thanks.
It really doesn't matter.

The definition of the argument of a complex number is given in radians and most text books and sources concerning complex numbers will use radians. However, degrees can be used in most simple situations too.

Most questions I have written and have seen in exam papers specify whether or not to give your answer in degrees or radians - and I think it would be quite harsh if they didn't and then didn't award full marks for correct answers in either degrees or radians (as it would be like accepting an answer in cm but not m!).

For security, I'd say to give your answer in radians but always read the question and check that it is not asking for an answer in degrees. These questions are not trying to 'catch you out' in any way, but that you are actually reading the question and not just applying a mechanistic technique on single sight of the word 'argument'.
0
reply
Raiden10
Badges: 17
Rep:
?
#7
Report 4 years ago
#7
(Original post by Youngey4)
Should I express the argument of a complex number in radians or degrees? My teacher said it should always be in radians but a past exam question refers to the answer in degrees.
Many thanks.
You could always give it in both. Then the right answer is assured. The more diminished your headspace devoted to the "answer", the wiser you are (assuming you actually know what the answer is).
0
reply
Chittesh14
Badges: 19
Rep:
?
#8
Report 4 years ago
#8
(Original post by kingaaran)
It really doesn't matter.

The definition of the argument of a complex number is given in radians and most text books and sources concerning complex numbers will use radians. However, degrees can be used in most simple situations too.

Most questions I have written and have seen in exam papers specify whether or not to give your answer in degrees or radians - and I think it would be quite harsh if they didn't and then didn't award full marks for correct answers in either degrees or radians (as it would be like accepting an answer in cm but not m!).

For security, I'd say to give your answer in radians but always read the question and check that it is not asking for an answer in degrees. These questions are not trying to 'catch you out' in any way, but that you are actually reading the question and not just applying a mechanistic technique on single sight of the word 'argument'.
Oh wow, my man done some sexy analysis on the argument.
A* English kicking in.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Do you think receiving Teacher Assessed Grades will impact your future?

I'm worried it will negatively impact me getting into university/college (75)
37.5%
I'm worried that I’m not academically prepared for the next stage in my educational journey (21)
10.5%
I'm worried it will impact my future career (13)
6.5%
I'm worried that my grades will be seen as ‘lesser’ because I didn’t take exams (50)
25%
I don’t think that receiving these grades will impact my future (25)
12.5%
I think that receiving these grades will affect me in another way (let us know in the discussion!) (16)
8%

Watched Threads

View All