anonymous
  • anonymous
Which of the following could be points on the unit circle? (answer choices attached!) ***CHOOSE ALL THAT APPLY!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
answer choices A,B,C,D from top to bottom... im not really sure on this one... pls explain! thanks! :) ***choose ALL that apply :)
anonymous
  • anonymous
thanks for coming :) do y'all get this one?
mathstudent55
  • mathstudent55
The equation of the unit circle is x^2 + y^2 = 1 Any point that makes the equation true is a point on the unit circle.

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More answers

anonymous
  • anonymous
okay lemme try plugging em in... one sec!
anonymous
  • anonymous
i tried the first one and it didn't work...... i got 1.34... did i do that right?? so A is WRONG right? :)
anonymous
  • anonymous
and for the second choice, i got 1.4444444... so that's wrong also right?
anonymous
  • anonymous
but (1,1) =1 when i plug in so C is an answer right?! :)
mathstudent55
  • mathstudent55
Try the second one again.
anonymous
  • anonymous
and for the last one, i got .28... so that's wrong right?? D is NOT an answer right?
mathstudent55
  • mathstudent55
(1, 1) x^2 + y^2 = 1 1^2 + 1^2 = 1? 1 + 1 = 1 Not true, so (1, 1) is not a point on the unite circle.
anonymous
  • anonymous
oh okay i did it again... i got 1 lol so B is an answer yes?
mathstudent55
  • mathstudent55
You are doing your math wrong.
mathstudent55
  • mathstudent55
Two work and two don't work.
anonymous
  • anonymous
ohhh and i see for C... lol my bad!!! :P so A and C are out... and B is an answer?
anonymous
  • anonymous
and lemme try D again... and D is 1 as well.. my bad.. i entered them all weird in my calc so everything was wrong.. my bad!!! LOL sorry bout that... so B and D are the answers?
mathstudent55
  • mathstudent55
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mathstudent55
  • mathstudent55
|dw:1361312348159:dw|
anonymous
  • anonymous
i see.. so my answers are B and D then right??
mathstudent55
  • mathstudent55
C doesn't work. I showed you above.
mathstudent55
  • mathstudent55
Yes.
anonymous
  • anonymous
awesome! Thanks :)
mathstudent55
  • mathstudent55
(0.8)^2 + (-0.6)^2 = 1? 0.64 + 0.36 = 1? 1 = 1 It works. D is true
mathstudent55
  • mathstudent55
wlcm

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