Question 876120
<pre>
tan<sup>-1</sup>[tan(200)]    

You may as well just punch it out entirely on a calculator,
since it doesn't involve a special angle. So you'll have to 
have to use a calculator anyway. So there's no need to simplify it. 

If you have a TI-83 of 84,

Press ON
Press CLEAR

If your calculator is already in radian mode, skip 
these five steps, otherwise:

Press MODE
Press the down arrow key twice to scroll down to RADIAN
Press ENTER
Press 2ND
Press MODE

With calculator in radian mode,

Press 2ND
Press TAN, see  tan<sup>-1</sup>(
Press TAN, see  tan<sup>-1</sup>(tan(
Type 200)), see tan<sup>-1</sup>(tan(200))
Press ENTER, see -1.06192983

Answer: -1.06192983
  
Edwin</pre>