diff options
Diffstat (limited to 'theories/Reals/Rtrigo.v')
| -rw-r--r-- | theories/Reals/Rtrigo.v | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/theories/Reals/Rtrigo.v b/theories/Reals/Rtrigo.v index 3499ea24..e45353b5 100644 --- a/theories/Reals/Rtrigo.v +++ b/theories/Reals/Rtrigo.v @@ -1,13 +1,11 @@ (************************************************************************) (* v * The Coq Proof Assistant / The Coq Development Team *) -(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011 *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *) (* \VV/ **************************************************************) (* // * This file is distributed under the terms of the *) (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(*i $Id: Rtrigo.v 14641 2011-11-06 11:59:10Z herbelin $ i*) - Require Import Rbase. Require Import Rfunctions. Require Import SeqSeries. @@ -18,7 +16,6 @@ Require Export Cos_rel. Require Export Cos_plus. Require Import ZArith_base. Require Import Zcomplements. -Require Import Classical_Prop. Local Open Scope nat_scope. Local Open Scope R_scope. @@ -372,7 +369,11 @@ Qed. Lemma cos_sin_0_var : forall x:R, cos x <> 0 \/ sin x <> 0. Proof. - intro; apply not_and_or; apply cos_sin_0. + intros x. + destruct (Req_dec (cos x) 0). 2: now left. + right. intros H'. + apply (cos_sin_0 x). + now split. Qed. (*****************************************************************) |