http://i237.photobucket.com/albums/ff3/Namburger/Hardcomplexnoq.jpg Can't get the last part
namburger Noob Member Joined Apr 29, 2007 Messages 228 Gender Male HSC 2008 Jun 19, 2008 #1 http://i237.photobucket.com/albums/ff3/Namburger/Hardcomplexnoq.jpg Can't get the last part
S sicmacao Member Joined May 23, 2006 Messages 44 Gender Male HSC 2002 Jun 20, 2008 #2 namburger said: http://i237.photobucket.com/albums/ff3/Namburger/Hardcomplexnoq.jpg Can't get the last part Click to expand... (iii) (a) (u-w)/(u+w) = (u/w-1)/(u/w+1) (dividing the numerator and the denominator by w) = (2i-1)/(2i+1) =3/5+4/5i (b) u+w = OV, u-w = UW by parallelogram law for vector addition and subtraction respectively. So theta is equal to Arg[(u-w)/(u+w)] cosx = 3/5, sinx = 4/5 => x is in 1st quadrant, so tanx = sinx/cosx = 4/3 Last edited: Jun 20, 2008
namburger said: http://i237.photobucket.com/albums/ff3/Namburger/Hardcomplexnoq.jpg Can't get the last part Click to expand... (iii) (a) (u-w)/(u+w) = (u/w-1)/(u/w+1) (dividing the numerator and the denominator by w) = (2i-1)/(2i+1) =3/5+4/5i (b) u+w = OV, u-w = UW by parallelogram law for vector addition and subtraction respectively. So theta is equal to Arg[(u-w)/(u+w)] cosx = 3/5, sinx = 4/5 => x is in 1st quadrant, so tanx = sinx/cosx = 4/3
namburger Noob Member Joined Apr 29, 2007 Messages 228 Gender Male HSC 2008 Jun 20, 2008 #3 But all angles have a direction or -/+ Which one is it Thanks anyway
namburger Noob Member Joined Apr 29, 2007 Messages 228 Gender Male HSC 2008 Jun 20, 2008 #4 actually dw. i reckon just the angle will give you the full marks. just curious. http://en.wikipedia.org/wiki/Angle#Positive_and_negative_angles
actually dw. i reckon just the angle will give you the full marks. just curious. http://en.wikipedia.org/wiki/Angle#Positive_and_negative_angles
Q qqmore Member Joined Feb 8, 2007 Messages 78 Gender Undisclosed HSC 2008 Jun 21, 2008 #5 just curious, where did u get this qns from?
namburger Noob Member Joined Apr 29, 2007 Messages 228 Gender Male HSC 2008 Jun 21, 2008 #6 http://www.angelfire.com/ab7/fourunit/ http://au.geocities.com/ext2papers/ http://www.geocities.com/fourunitmaths/ 1st paper of the 1st link
http://www.angelfire.com/ab7/fourunit/ http://au.geocities.com/ext2papers/ http://www.geocities.com/fourunitmaths/ 1st paper of the 1st link