if the point (.53,y) is on the unit circle in quadrant 1, what is the value of y?

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    math_celebrity Administrator Staff Member

    if the point (.53,y) is on the unit circle in quadrant 1, what is the value of y?

    Unit circle equation:
    x^2 + y^2 = 1

    Plugging in x = 0.53, we get
    (0.53)^2 + y^2 = 1
    0.2809 + y^2 = 1

    Subtract 0.2809 from each side:
    y^2 = 0.7191
    y = 0.848


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