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-rw-r--r--theories/Reals/Rtrigo.v5
1 files changed, 2 insertions, 3 deletions
diff --git a/theories/Reals/Rtrigo.v b/theories/Reals/Rtrigo.v
index 44a020d570..92accec1cf 100644
--- a/theories/Reals/Rtrigo.v
+++ b/theories/Reals/Rtrigo.v
@@ -20,10 +20,9 @@ Require Rlimit.
Require Binome.
Require Export Rtrigo_def.
Require Export Rtrigo_alt.
+Require Export Cos_plus.
-(* The two remaining axioms *)
-Axiom cos_plus : (x,y:R) ``(cos (x+y))==(cos x)*(cos y)-(sin x)*(sin y)``.
-
+(** sin_PI2 is the only remaining axiom **)
Axiom sin_PI2 : ``(sin (PI/2))==1``.
(* Here, we have the euclidian division *)