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Which of these points lies on the unit circle centred at the origin?
A(2/3, 2/3)
B(1/2, 1/2)
C(1, 1)
D(3/5, 4/5)
Answer & Solution
Correct answer: D. (3/5, 4/5)
Only (3/5, 4/5) satisfies x squared plus y squared equal to 1, since 9/25 + 16/25 = 1.
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