Results 1 to 1 of 1

Thread: complex numbers problem can someone explain where im going wrong?

  1. August 15th 2012, 04:56 PM #1
    rich1979
    rich1979 is offline
    Newbie
    Joined
    Jul 2012
    From
    UK
    Posts
    16

    can someone explain where im going wrong?

    V=40+i35volts
    I=6+i3amps
    i have worked out that the phase difference between V and I is A= 14.6degrees

    converted V and I into polar form V= 53.2/41.2degrees I=6.8/26.6degrees now find the power(watt) Power=(V) X( I )X (cosA)

    (V)X(I)=361/67.8degrees in polar form


    can anyone please explain how i multiply a polar number by cos14.6 or have i gone wrong somewhere?
    Last edited by rich1979; August 15th 2012 at 07:46 PM.
    Follow Math Help Forum on Facebook and Google+
« How to include the right units? | Finance Assignment Help »

Similar Math Help Forum Discussions

  1. Complex numbers problem
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: August 3rd 2012, 11:02 AM
  2. Complex Numbers Problem
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: March 16th 2011, 10:42 PM
  3. Can someone explain with steps! Getting this wrong, Seperation of variables
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 26th 2010, 02:45 AM
  4. Problem with complex numbers
    Posted in the Calculus Forum
    Replies: 2
    Last Post: February 1st 2008, 07:11 AM
  5. Pre-Calc Graphing with Complex numbers. Multiplying with complex numbers.
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 24th 2007, 03:49 AM

Search Tags


/mathhelpforum @mathhelpforum