Question

Evaluate `tan^(-1) tan((7pi)/8)` ?

Answer 1

`(7pi)/8`
[Assuming question was `tan^-1tan((7pi)/8)`]

Explanation:

Obviously this question lacks complete definition, but it seems reasonable that what was intended was: `tan^-1tan((7pi)/8)`

Then, we should consider: `f^-1(x) xx f(x) = x`

So, in this example: `tan^-1tan((7pi)/8) = (7pi)/8`