# Thread: Inverse Functions help

1. ## Inverse Functions help

Hey guys i'm trying to figure these Inverse problems out. Any and all help would be greatly appreciated.

arcTan(- √3) . Give Answer in Exact Radians

and
is this possible?

Sin[arcCos(-1/3)+arcSin(2/5)] . Give Answer in Exact Radians

2. Originally Posted by baconfoot
arcTan(- √3) . Give Answer in Exact Radians
What angle measure $\theta$ gives you a tangent value of $\sqrt{3}$? Where (that is, in which quadrants) is tangent negative?

Originally Posted by baconfoot
Sin[arcCos(-1/3)+arcSin(2/5)] . Give Answer in Exact Radians
If you've learned about angle-sum identities, this might be a good place to apply one.