haleyelizabeth2017
  • haleyelizabeth2017
Trig help...again :)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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haleyelizabeth2017
  • haleyelizabeth2017
What values for \(\theta~(0\le\theta\le2\pi)\) satisfy the equation?\[cos\theta-tan\theta \cos\theta=0\]
anonymous
  • anonymous
tan is the same as sin/cos
anonymous
  • anonymous
(sin/cos)cos simplifies to what

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haleyelizabeth2017
  • haleyelizabeth2017
sin
anonymous
  • anonymous
correct
anonymous
  • anonymous
so we have cos - sin = 0
haleyelizabeth2017
  • haleyelizabeth2017
ah hah
haleyelizabeth2017
  • haleyelizabeth2017
Still not completely positive on how to finish it....
anonymous
  • anonymous
http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Unit_circle_angles_color.svg/1024px-Unit_circle_angles_color.svg.png
anonymous
  • anonymous
us the unit circle
anonymous
  • anonymous
*use
haleyelizabeth2017
  • haleyelizabeth2017
Okay...
haleyelizabeth2017
  • haleyelizabeth2017
Wait...do I find where each equal 0? O.o
anonymous
  • anonymous
nope
anonymous
  • anonymous
find where they are both equal to the same thing
haleyelizabeth2017
  • haleyelizabeth2017
Ah one sec
haleyelizabeth2017
  • haleyelizabeth2017
Well, 45 and 225
haleyelizabeth2017
  • haleyelizabeth2017
Are those the only 2?
anonymous
  • anonymous
keep it in radians
haleyelizabeth2017
  • haleyelizabeth2017
Oh, sorry. \[\frac{\pi}{4}\] and \[\frac{5\pi}{4}\]
anonymous
  • anonymous
That's right
haleyelizabeth2017
  • haleyelizabeth2017
Okay! That it?
anonymous
  • anonymous
sure is
haleyelizabeth2017
  • haleyelizabeth2017
Thank you very much :)
anonymous
  • anonymous
no problem

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