anonymous
  • anonymous
sin(3pi/4)=_____ (answer choices attached inside!)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Hero
  • Hero
Where are the attachments?
anonymous
  • anonymous
sorry right here haha :P answer choceis A,B,C,D from top to bottom :) **my answer: B. sq.rt 2/2 is that right? :)
Hero
  • Hero
Are you familiar with the unit circle?

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More answers

anonymous
  • anonymous
yes.. its a circle with the radius of 1 right?
Hero
  • Hero
Yes, but we have to figure out the exact value. So, what I would do is convert radians to degrees first. If you let pi = 180, then you will have: sin(3(180)/4) = sin(3(45))
Hero
  • Hero
That's your hint.
anonymous
  • anonymous
ok... :)
anonymous
  • anonymous
and they both equal each other!! So is my answer B. then? :)
Hero
  • Hero
B is the correct answer, but how did you figure it out?
anonymous
  • anonymous
well i used ur hint and plugged it into my calc and they both had .088 as the result and laso b4 that, i did sin3pi/4and i just converted it :) hehe
anonymous
  • anonymous
thanks :)
Hero
  • Hero
The only thing you need to figure it out is a unit circle. \[\sin(135^{\circ}) = \frac{\sqrt{2}}{2}\]
anonymous
  • anonymous
ok.. thanks :)

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