From 6259014a4234a4d89abe228028d9c4610ee91b42 Mon Sep 17 00:00:00 2001
From: Dave Witte Morris <Dave.Morris@uleth.ca>
Date: Thu, 26 Mar 2020 16:20:31 -0600
Subject: [PATCH] deprecate cotan

---
 src/sage/rings/complex_mpc.pyx    | 6 +++---
 src/sage/rings/complex_number.pyx | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/sage/rings/complex_mpc.pyx b/src/sage/rings/complex_mpc.pyx
index 991eced6721..fa002160baa 100644
--- a/src/sage/rings/complex_mpc.pyx
+++ b/src/sage/rings/complex_mpc.pyx
@@ -83,6 +83,8 @@ from .real_mpfr import mpfr_prec_min, mpfr_prec_max
 from sage.structure.richcmp cimport rich_to_bool, richcmp
 from sage.categories.fields import Fields
 
+from sage.misc.superseded import deprecated_function_alias
+
 cimport gmpy2
 gmpy2.import_gmpy2()
 
@@ -1985,8 +1987,6 @@ cdef class MPComplexNumber(sage.structure.element.FieldElement):
             sage: MPC = MPComplexField(53)
             sage: (1+MPC(I)).cot()
             0.217621561854403 - 0.868014142895925*I
-            sage: (1+MPC(I)).cotan()
-            0.217621561854403 - 0.868014142895925*I
             sage: i = MPComplexField(200).0
             sage: (1+i).cot()
             0.21762156185440268136513424360523807352075436916785404091068 - 0.86801414289592494863584920891627388827343874994609327121115*I
@@ -1996,7 +1996,7 @@ cdef class MPComplexNumber(sage.structure.element.FieldElement):
         """
         return ~(self.tan())
 
-    cotan = cot # provide this alias for backwards compatibility (2020-3-25)
+    cotan = deprecated_function_alias(29412, cot)
 
     ################################
     # Other functions
diff --git a/src/sage/rings/complex_number.pyx b/src/sage/rings/complex_number.pyx
index c6b6ff241ad..cb657193885 100644
--- a/src/sage/rings/complex_number.pyx
+++ b/src/sage/rings/complex_number.pyx
@@ -43,6 +43,8 @@ import sage.rings.infinity as infinity
 from sage.libs.mpmath.utils cimport mpfr_to_mpfval
 from sage.rings.integer_ring import ZZ
 
+from sage.misc.superseded import deprecated_function_alias
+
 cimport gmpy2
 gmpy2.import_gmpy2()
 
@@ -1461,8 +1463,6 @@ cdef class ComplexNumber(sage.structure.element.FieldElement):
 
             sage: (1+CC(I)).cot()
             0.217621561854403 - 0.868014142895925*I
-            sage: (1+CC(I)).cotan()
-            0.217621561854403 - 0.868014142895925*I
             sage: i = ComplexField(200).0
             sage: (1+i).cot()
             0.21762156185440268136513424360523807352075436916785404091068 - 0.86801414289592494863584920891627388827343874994609327121115*I
@@ -1479,7 +1479,7 @@ cdef class ComplexNumber(sage.structure.element.FieldElement):
         """
         return ~(self.tan())
 
-    cotan = cot # provide this alias for backwards compatibility (2020-3-25)
+    cotan = deprecated_function_alias(29412, cot)
 
     def cos(self):
         """