w = root 3 - i find w^5 in the form x + iy where x and y are real
Jackson94 Member Joined Jun 5, 2010 Messages 44 Gender Male HSC 2012 Nov 24, 2011 #1 w = root 3 - i find w^5 in the form x + iy where x and y are real
M michaeljennings Active Member Joined Oct 11, 2009 Messages 2,074 Location Sydney Gender Male HSC 2011 Nov 24, 2011 #2 Jackson94 said: w = root 3 - i find w^5 in the form x + iy where x and y are real Click to expand... convert to cis form which is 2cis(-pi/6) then use De Moivre's theorem and you get 2^5cis(-5pi/6) then convert back to x +iy form -16root3 -16
Jackson94 said: w = root 3 - i find w^5 in the form x + iy where x and y are real Click to expand... convert to cis form which is 2cis(-pi/6) then use De Moivre's theorem and you get 2^5cis(-5pi/6) then convert back to x +iy form -16root3 -16