Question

tan x degree = 90

Answer 1

So we have:
\[\tan x = 90\]
Now, in order to find the x value that satisfies the equation, we Enclose both sides wuth Tan^-1
like this:
\[\tan^{-1} (\tan x)=\tan^{-1} (90)\]
Tan^-1 and tan are two opposite operations, so we can simplify them, ending up with:
\[x=\tan^{-1} (90)\]
then x~ 89.363