Have I done this right
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > Have I done this right

Have I done this right

[From: ] [author: ] [Date: 11-10-30] [Hit: ]
5 because you need to have a 2sinx dx to replace with du and since you dun have a 2, you need to times 2 and times 0.......
http://www.flickr.com/photos/51672712@N0…

Okay, after that, can I cancel the "sin" out and and then put the 2 in front of the integral?

-
hi, what you should do instead of your last step is:
since you know du/dx = 2sinx
you know du = 2sinx dx
your last sentence should be:
integrate(0.5 u^3 du)
0.5 because you need to have a 2sinx dx to replace with du and since you dun have a 2, you need to times 2 and times 0.5

-
∫[(sin(x)][1-2cos(x)]³dx u=1-2cos(x) du=2sin(x)dx

∫(u³)(du/2=(1/8)u^4+c
=(1/8)[1-2cos(x)]^4 +c

-
I guess
1
keywords: Have,done,right,this,Have I done this right
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .