vera_ewing
  • vera_ewing
Math question
Mathematics
schrodinger
  • schrodinger
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vera_ewing
  • vera_ewing
vera_ewing
  • vera_ewing
amoodarya
  • amoodarya
\[\sqrt{1-\sin^2 (\theta)}=\pm \cos (\theta)\\if =\cos (\theta)\\cos(\theta) \geq 0\]

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amoodarya
  • amoodarya
can you go on ?
vera_ewing
  • vera_ewing
I'm confused...
anonymous
  • anonymous
of course you are this question is ill posed
anonymous
  • anonymous
someone who is deficient in the logic department wrote it this one goes right in to the "bad math" pile. what is true is that \[\sqrt{1-\sin^2(x)}=\cos(x)\] if \(\cos(x)\geq 0\)
anonymous
  • anonymous
cosine is positive in quadrant 1 and 4
amoodarya
  • amoodarya
|dw:1436191878523:dw|
vera_ewing
  • vera_ewing
Oh right, I keep thinking Quadrant 3 is positive. So the answer is B?
anonymous
  • anonymous
yes B

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