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Which of the following points could be found on the Unit Circle?

Select ALL that apply.

$\Big(\cfrac {\sqrt{2}}{2}, \cfrac {\sqrt{2}} {2}\Big)$

$\Big( \cfrac{1}{2}, \cfrac {\sqrt {2}}{2}\Big)$

$\Big(\cfrac{1}{2}, \cfrac{\sqrt{3}}{2}\Big)$

$(1, 1)$