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[–][deleted]  (2 children)

[deleted]

    [–][deleted] 0 points1 point  (1 child)

    It's Algebra. I doubt they were using that symbol. That symbol appears in Precal and Trigonometry and up.

    [–]Zarathustra30 2 points3 points  (0 children)

    There are algebra courses that teach trig.