Here's the question you clicked on:
greeneyes<3
Evaluate the expression in radian and degrees; without using a calculator. Please explain or show work! thank you! :]
\[\tan^{-1} (\sqrt{3}/3)\]
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.
You will have two answers for each since tangent is positive in both quadrant I and III
i'm confused. How do you know the values?