You are Here: Home >< Maths

Further maths question help PLEASE!!! (modulus and argument stuff) watch

1. This is like the second question i've come across of this nature and I couldn't do either (partly because I haven't been taught this bit yet) so thought i'd ask for help.

The complex number Z is such that modulus of Z is 7 and the Argument of 2 is 11π/6. Find Z in the form a+bi where a and b are exact real numbers to be found

I have no idea where to start thank you for any replies
2. (Original post by Ismaeel Ali)
This is like the second question i've come across of this nature and I couldn't do either (partly because I haven't been taught this bit yet) so thought i'd ask for help.

The complex number Z is such that modulus of Z is 7 and the Argument of 2 is 11π/6. Find Z in the form a+bi where a and b are exact real numbers to be found

I have no idea where to start thank you for any replies
Express z in polar form. R (cos(argz)+isin (argz)) and evaluate the arguments.
3. (Original post by NotNotBatman)
Express z in polar form. R (cos(argz)+isin (argz)) and evaluate the arguments.
OMG YOU ARE A BLOODY GENIUS HOW DID I NOT SEE THAT
im so irritated...thank you so much for this tho i would have stared at this for decades and got no where!!!!!!
4. (Original post by Ismaeel Ali)
The complex number Z is such that modulus of Z is 7 and the Argument of 2 is 11π/6. Find Z in the form a+bi where a and b are exact real numbers to be found
You may find it helpful to plot the point first of all, on an argand diagram, include the modulus and argument. Then the x,y components a,b, may become clear.
5. (Original post by ghostwalker)
You may find it helpful to plot the point first of all, on an argand diagram, include the modulus and argument. Then the x,y components a,b, may become clear.
Yah i always do that else i get mixed up as to what quadrant the complex number lies in. thanks for the reply

Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 28, 2017
Today on TSR

Thought he was 19... really he's 14

University open days

Wed, 25 Jul '18
2. University of Buckingham
Wed, 25 Jul '18
3. Bournemouth University
Wed, 1 Aug '18
Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants