Another problem (1 Viewer)

DarkDude

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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

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That factorises to:

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

which you can now solve as:

sinx - cosx = 0 or sinx - 2cosx = 0
 

Dreamerish*~

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DarkDude said:
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

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Dreamerish*~ said:
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*~

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acmilan said:
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

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Dreamerish*~ said:
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*~

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acmilan said:
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

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

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