Please help with the following question:

If $\displaystyle x^\circ $ is an acute angle such that $\displaystyle Tan x^\circ = 4/3 $, Determine the exact value of sin (x + 30).

To tackle this I initially wanted to do $\displaystyle tan^-^1(4/3)$ and then sub that into the value as x but it doesn't seem the correct procedure for the question.

Thanks,

Kris