1. Solve for x: arctan (2x - 3) = pi/4
   
   hint
   answer
   
2. arctan \/3  =
   
   hint
   answer
   
3. Find tan y if y = arcsec \/5
                                        2
   
   hint
   answer
   
4. Find cos y if y = arcsin x
   
   hint
   answer