[BlueBaron]

So, we started learning basic Trigonometry in school. So far, even though hard I managed to understand most of it. We have homework, I was able to successfully finish all tasks expect one:

I must find A= є?, If given Tangent is 36є. I did search on ****** but, it says "Use a calculator" Like I don't know how to. I found its inverse function, Arctan and the final answer is 88.40...є, but how do I find it on paper without the use of calculators.

Much appreciated