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How do find the arctan(2?
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|dw:1418399489298:dw| isn't this the tangent basically?
I though the radius of the unit circle was 1, so I'm not sure how to find a value >1 using arctan. I've watched the Khan academy video already and I'm still lost.
for this its easier to use a plain triangle
|dw:1418399729416:dw|
|dw:1418399840942:dw|
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