Quantcast Isolate to solve the equation - XP Math - Forums
XP Math Home Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment PDF Version

Go Back   XP Math - Forums > Mathematics > Homework Help

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 04-02-2010   #1
magmagod
 
Join Date: Mar 2010
Posts: 9
Default Isolate to solve the equation

So the question is basically solve each equation for 0<x<2pi...i just have trouble with isolating the equations for the following:

square root 2 * sinx = 2sinx cosx

2cosx - 3/cosx + 2 * square root2 = 0

for the first one i got this far:
square root 2 sinx = 2sinx (double angle)
squared both sides and ended with 2 sinx = 4 sin^2x
divided by 2 sinx to both sides and got 1 = 2 sinx
then i isolated for sinx ... sinx = 1/2
is it right so far? then i just found the related acute angle and the values in Q 1 and 3

I appreciate your help so far i will try and help you with your problems..

Last edited by magmagod; 04-04-2010 at 12:01 PM..
magmagod is offline   Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:24 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
XP Math