Another problem (1 Viewer)

[DarkDude]

I am trying to solve a trig identity equation without much luck
solve
sin^2x - 3sinxcosx+2cos^2x=0

i have been going around in circles with this one and my head is starting to hurt.

 

[acmilan]

That factorises to:

(sinx - cosx)(sinx - 2cosx) = 0

which you can now solve as:

sinx - cosx = 0 or sinx - 2cosx = 0

 

[Dreamerish*~]

I am trying to solve a trig identity equation without much luck
solve
sin^2x - 3sinxcosx+2cos^2x=0

i have been going around in circles with this one and my head is starting to hurt.

sin²x - 3sinxcosx + 2cos²x = 0

(sinx - 2cosx)(sinx - cosx) = 0

sinx = 2cosx, sinx = cosx

Can you go on from there?

EDIT: Damn it, Acmilan. Must you be as quick as you are smart?

 

[acmilan]

EDIT: Damn it, Acmilan. Must you be as quick as you are smart?

Haha either that, or the fact that my msn alerts me whenever someone posts a question on here

 

[Dreamerish*~]

Haha either that, or the fact that my msn alerts me whenever someone posts a question on here

Whoah, how does that work? And does it work for the chemistry forum?

 

[acmilan]

Whoah, how does that work? And does it work for the chemistry forum?

No, mods get sent an email whenever a new thread is made in their forum, so i get it sent to my isp email. I just hooked up my email account to my msn so it alerts me when a new email is sent.

 

[Dreamerish*~]

No, mods get sent an email whenever a new thread is made in their forum, so i get it sent to my isp email. I just hooked up my email account to my msn so it alerts me when a new email is sent.

Oh damn. Ragerunner must be living it up.

 

[DarkDude]

Thanks acmilan and dreamerish, i am getting smarter by the minute.