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OpenStudy (anonymous):
This graph - http://bit.ly/Lwp5Mo - uses arccos and goes past its domain of [-1, 1]? How is it able to go past its domain?
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OpenStudy (asnaseer):
why do you think its going past its domain? as long as the denominator is greater than or equal to 3, then all is fine. see here: http://www.wolframalpha.com/input/?i=sqrt%28x^2-2x%2B10%29+%3E%3D+3
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