4sinxcosx + 2 sinx? :(
Favorites|Homepage
Subscriptions | sitemap
HOME > > 4sinxcosx + 2 sinx? :(

4sinxcosx + 2 sinx? :(

[From: ] [author: ] [Date: 12-05-02] [Hit: ]
-If it is supposed to be equal to zero,now you need to solve for x, you have to check in which angles the x of sinx is equal to zero.I leave the final results of angles to you which you can find easily by calculator using arcsin and arccos.......
Please help me! My brain is bit at the stupid range so...yeah. :( Please? With a cherry on top?

-
If it is supposed to be equal to zero, you can solve it this way:

4sinxcosx + 2 sinx = 0
Factor 2 sinx:

2 sinx * (2cosx+1) = 0
So you can easily get either of them equal to zero:

sinx=0
2cosx+1=0
now you need to solve for x, you have to check in which angles the x of sinx is equal to zero.
and for which angles of x your cosx is equal to -1/2
I leave the final results of angles to you which you can find easily by calculator using arcsin and arccos.
Piece of cake :)
1
keywords: sinx,sinxcosx,4sinxcosx + 2 sinx? :(
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .