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Which of the following could be points on the unit circle? (answer choices attached!) ***CHOOSE ALL THAT APPLY!!!!

Mathematics
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answer choices A,B,C,D from top to bottom... im not really sure on this one... pls explain! thanks! :) ***choose ALL that apply :)
thanks for coming :) do y'all get this one?
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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Other answers:

okay lemme try plugging em in... one sec!
i tried the first one and it didn't work...... i got 1.34... did i do that right?? so A is WRONG right? :)
and for the second choice, i got 1.4444444... so that's wrong also right?
but (1,1) =1 when i plug in so C is an answer right?! :)
Try the second one again.
and for the last one, i got .28... so that's wrong right?? D is NOT an answer right?
(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.
oh okay i did it again... i got 1 lol so B is an answer yes?
You are doing your math wrong.
Two work and two don't work.
ohhh and i see for C... lol my bad!!! :P so A and C are out... and B is an answer?
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?
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i see.. so my answers are B and D then right??
C doesn't work. I showed you above.
Yes.
awesome! Thanks :)
(0.8)^2 + (-0.6)^2 = 1? 0.64 + 0.36 = 1? 1 = 1 It works. D is true
wlcm

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