IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: Light on May 25, 2010, 08:52:52 am

Title: COMPLEX NUMBERS
Post by: Light on May 25, 2010, 08:52:52 am

how to do question 10 (iii) and 10 (iv).please draw out the relevant Argand diagram so that i could understand better especially (iii) .couldnt understand marking scheme.no idea why have to (4+2i)w and (4+2i)/w.HELP!!!!!!!!!!

Title: Re: COMPLEX NUMBERS
Post by: astarmathsandphysics on May 25, 2010, 11:37:46 am

When i get home

Title: Re: COMPLEX NUMBERS
Post by: Light on May 26, 2010, 06:22:36 am

anyone ?

Title: Re: COMPLEX NUMBERS
Post by: astarmathsandphysics on May 26, 2010, 07:59:58 am

Now

Title: Re: COMPLEX NUMBERS
Post by: astarmathsandphysics on May 26, 2010, 08:13:23 am

iii)z has argument theta and w has argument 120. When we divide by w we subtract 120 from argument of z and when we times by  w we add 120 to the adument.

Title: Re: COMPLEX NUMBERS
Post by: astarmathsandphysics on May 26, 2010, 08:13:48 am

see above attached doc