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OpenStudy (anonymous):
What is the principle value of tan^−1(0) I'm working on trigonometry and I don't know where else to really look for the answer.
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OpenStudy (anonymous):
\[0 \le \tan^{-1}(0) \le \frac{\pi}{2}\] http://www.efunda.com/math/trig_functions/principal.cfm
OpenStudy (anonymous):
Thanks for the answer and the link!
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