anonymous
  • anonymous
Evaluate the expression in radian and degrees; without using a calculator. Please explain or show work! thank you! :]
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
\[\tan^{-1} (\sqrt{3}/3)\]
anonymous
  • anonymous
If you know the unit circle values all you have to do is remember which values give you \[\tan \sqrt{3}/3\] If you only know sine and cosine values then sine would have to be 1/2 and cosine would be the sqrt of 3 over 2.
anonymous
  • anonymous
You will have two answers for each since tangent is positive in both quadrant I and III

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anonymous
  • anonymous
i'm confused. How do you know the values?

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