PDA

View Full Version : Oh my god dear lord please helo xD



esperanto
08-28-2012, 04:32 PM
I fail at math. SO badly. I have no idea how to solve this problem. Can someone please give me some pointers? Thanks! ^_^

5676

esperanto
08-28-2012, 04:33 PM
Fail. Mod please change that title to *help.

Riku
08-28-2012, 04:41 PM
Should be 0, 5pi/4, 7pi/4.

esperanto
08-28-2012, 04:46 PM
Thank you! How did you get to that Riku? The radical confuses me :(

Riku
08-28-2012, 04:49 PM
Manipulate the equation to get:

sin(x) * (2sin(x) + sqrt(2)) = 0

Then you see that sin(x) = 0 is a solution, since it makes the left side of the equation = 0.

Then we need to find values of x that make (2sin(x) + sqrt(2)) = 0, and those values are 5pi/4, 7pi/4.