M mc1007 New Member Joined Sep 8, 2009 Messages 29 Gender Male HSC 2011 Feb 9, 2011 #1 Can someone show me how to do this please? much appreciated!
B Bored Of Fail 3 Banned Joined Feb 4, 2011 Messages 145 Gender Undisclosed HSC 2009 Feb 9, 2011 #2 mc1007 said: Can someone show me how to do this please? much appreciated!View attachment 22670 Click to expand... its 4unit, dont worry
mc1007 said: Can someone show me how to do this please? much appreciated!View attachment 22670 Click to expand... its 4unit, dont worry
B Bored Of Fail 3 Banned Joined Feb 4, 2011 Messages 145 Gender Undisclosed HSC 2009 Feb 9, 2011 #3 = integral sin^2 (3x) sin(3x) = integral ( 1-cos^2 (3x) ) sin(3x) dx now sub u= cos(3x) and remember to change the limits of the integral
= integral sin^2 (3x) sin(3x) = integral ( 1-cos^2 (3x) ) sin(3x) dx now sub u= cos(3x) and remember to change the limits of the integral
