28 Sep
2014
28 Sep
'14
11:13 p.m.
What is the "simplest" 0 FullSimplify can't see? Extra credit if FunctionExpand fails too. I'll start the bidding with In[97]:= FullSimplify[FunctionExpand[Subtract @@ %]] Out[97]= ArcCos[-(7/9)] - 2 ArcSec[3] In[98]:= TrigExpand[Cos[%]] Out[98]= 1 --rwg