- #1

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## Homework Statement

I am working through a calc 2 problem. I managed to get here without really completely understanding trig. There was a point in the problem where θ=Tan

^{-1}(-2/2) = -Pi/4. How does this work?

## Homework Equations

I do not know any relevant equations

## The Attempt at a Solution

I really have no clue. I have done research countless times.