revise ta trigo

theories/real.why

@@ -297,7 +297,7 @@ theory TrigonometryTest
   use import Square
 
   lemma Cos_2_pi : cos (2.0 * pi) = 1.0
-  lemma Sin_2_pi : cos (2.0 * pi) = 0.
+  lemma Sin_2_pi : sin (2.0 * pi) = 0.
   lemma Tan_pi_3 : tan (pi / 2.0) = sqrt 3.0
   lemma Atan_1   : atan 1.0 = pi / 4.0
 

why.conf

 [main]
 library = "theories"
-timelimit = 10
+timelimit = 2
 
 [prover alt-ergo]
 name = "Alt-Ergo"