anonymous
  • anonymous
What values for theta(0≤theta≤2pi) satisfy the equation?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
@mathway
anonymous
  • anonymous
Why don't you factor cos theta? :)

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anonymous
  • anonymous
If i factor cos theta i would get costheta(2sintheta+1)
anonymous
  • anonymous
then cos theta=0 2sintheta+1=0
anonymous
  • anonymous
Yes, then you would have two solutions, right?
anonymous
  • anonymous
ye
anonymous
  • anonymous
Oh, yes, you're right.
anonymous
  • anonymous
I'm stuck at this part ;-;
anonymous
  • anonymous
my textbook says use the unit circle but how??!
anonymous
  • anonymous
You can still work on 2sintheta+1=0.
anonymous
  • anonymous
it becomes sintheta=-1/2
anonymous
  • anonymous
x.x
anonymous
  • anonymous
Right so take a look at a unit circle.
anonymous
  • anonymous
|dw:1438490613452:dw|
anonymous
  • anonymous
:O
anonymous
  • anonymous
First, find where cos theta=0.
anonymous
  • anonymous
so costheta=0 is the line in the middle?
anonymous
  • anonymous
Yes. They are pi/2 and 3pi/2.
anonymous
  • anonymous
Then, find where sin theta =-1/2.
anonymous
  • anonymous
hmm
anonymous
  • anonymous
|dw:1438490799061:dw|
anonymous
  • anonymous
No. You should look at the y-coordinate in finding for the sine theta,
anonymous
  • anonymous
ohh i forgot (cos,sin)
anonymous
  • anonymous
lol yes :D
anonymous
  • anonymous
okie so it would be |dw:1438490900498:dw|
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
:O so the answer is b!
anonymous
  • anonymous
Correct. :D
anonymous
  • anonymous
:D
anonymous
  • anonymous
i might need help later :P but fur now bai!

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