Issue #21902: Replace incorrect 'hyperbolic arc sine' (etc.) with 'inverse hyperbolic sine' (etc.). Remove meaningless reference to radians.
diff --git a/Doc/library/cmath.rst b/Doc/library/cmath.rst
index d7778df..a981d94 100644
--- a/Doc/library/cmath.rst
+++ b/Doc/library/cmath.rst
@@ -149,13 +149,13 @@
.. function:: acosh(x)
- Return the hyperbolic arc cosine of *x*. There is one branch cut, extending left
- from 1 along the real axis to -∞, continuous from above.
+ Return the inverse hyperbolic cosine of *x*. There is one branch cut,
+ extending left from 1 along the real axis to -∞, continuous from above.
.. function:: asinh(x)
- Return the hyperbolic arc sine of *x*. There are two branch cuts:
+ Return the inverse hyperbolic sine of *x*. There are two branch cuts:
One extends from ``1j`` along the imaginary axis to ``∞j``,
continuous from the right. The other extends from ``-1j`` along
the imaginary axis to ``-∞j``, continuous from the left.
@@ -163,7 +163,7 @@
.. function:: atanh(x)
- Return the hyperbolic arc tangent of *x*. There are two branch cuts: One
+ Return the inverse hyperbolic tangent of *x*. There are two branch cuts: One
extends from ``1`` along the real axis to ``∞``, continuous from below. The
other extends from ``-1`` along the real axis to ``-∞``, continuous from
above.
diff --git a/Modules/cmathmodule.c b/Modules/cmathmodule.c
index 91b369a..eb2853c 100644
--- a/Modules/cmathmodule.c
+++ b/Modules/cmathmodule.c
@@ -192,7 +192,7 @@
PyDoc_STRVAR(c_acosh_doc,
"acosh(x)\n"
"\n"
-"Return the hyperbolic arccosine of x.");
+"Return the inverse hyperbolic cosine of x.");
static Py_complex
@@ -249,7 +249,7 @@
PyDoc_STRVAR(c_asinh_doc,
"asinh(x)\n"
"\n"
-"Return the hyperbolic arc sine of x.");
+"Return the inverse hyperbolic sine of x.");
static Py_complex
@@ -353,7 +353,7 @@
PyDoc_STRVAR(c_atanh_doc,
"atanh(x)\n"
"\n"
-"Return the hyperbolic arc tangent of x.");
+"Return the inverse hyperbolic tangent of x.");
static Py_complex
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 7f094ff..910d5ea 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -873,18 +873,18 @@
FUNC1(acos, acos, 0,
"acos(x)\n\nReturn the arc cosine (measured in radians) of x.")
FUNC1(acosh, m_acosh, 0,
- "acosh(x)\n\nReturn the hyperbolic arc cosine (measured in radians) of x.")
+ "acosh(x)\n\nReturn the inverse hyperbolic cosine of x.")
FUNC1(asin, asin, 0,
"asin(x)\n\nReturn the arc sine (measured in radians) of x.")
FUNC1(asinh, m_asinh, 0,
- "asinh(x)\n\nReturn the hyperbolic arc sine (measured in radians) of x.")
+ "asinh(x)\n\nReturn the inverse hyperbolic sine of x.")
FUNC1(atan, atan, 0,
"atan(x)\n\nReturn the arc tangent (measured in radians) of x.")
FUNC2(atan2, m_atan2,
"atan2(y, x)\n\nReturn the arc tangent (measured in radians) of y/x.\n"
"Unlike atan(y/x), the signs of both x and y are considered.")
FUNC1(atanh, m_atanh, 0,
- "atanh(x)\n\nReturn the hyperbolic arc tangent (measured in radians) of x.")
+ "atanh(x)\n\nReturn the inverse hyperbolic tangent of x.")
static PyObject * math_ceil(PyObject *self, PyObject *number) {
_Py_IDENTIFIER(__ceil__);