diff --git a/editions/tw5.com/tiddlers/filters/acos Operator.tid b/editions/tw5.com/tiddlers/filters/acos Operator.tid
new file mode 100644
index 000000000..10c73675b
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/acos Operator.tid	
@@ -0,0 +1,15 @@
+caption: acos
+created: 20211019211936842
+modified: 20211021222835888
+op-input: a [[selection of titles|Title Selection]]
+op-output: the arccosine (in radians) of the input numbers
+op-purpose: calculate the arccosine value (in radians) of a list of numbers
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: acos Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.tip " This is the inverse operation of [[cos|cos Operator]]: cos calculate the cosine of an angle (in radian), but acos calculate the angle (in radian) of a cosine.">>
+
+<<.operator-examples "acos">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/asin Operator.tid b/editions/tw5.com/tiddlers/filters/asin Operator.tid
new file mode 100644
index 000000000..07fe2ca10
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/asin Operator.tid	
@@ -0,0 +1,15 @@
+caption: asin
+created: 20211019212120548
+modified: 20211021222841479
+op-input: a [[selection of titles|Title Selection]]
+op-output: the arcsine (in radians) of the input numbers
+op-purpose: calculate the arcsine value (in radians) of a list of numbers
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: asin Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.tip " This is the inverse operation of [[sin|sin Operator]]: sin calculate the sine of an angle (in radian), but asin calculate the angle (in radian) of a sine.">>
+
+<<.operator-examples "asin">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/atan Operator.tid b/editions/tw5.com/tiddlers/filters/atan Operator.tid
new file mode 100644
index 000000000..34003829c
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/atan Operator.tid	
@@ -0,0 +1,13 @@
+caption: atan
+created: 20211019211516128
+modified: 20211021222847610
+op-input: a [[selection of titles|Title Selection]]
+op-output: the arctangent (in radians) of the input numbers
+op-purpose: calculate the arctangent value (in radians) of a list of numbers
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: atan Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.operator-examples "atan">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/atan2 Operator.tid b/editions/tw5.com/tiddlers/filters/atan2 Operator.tid
new file mode 100644
index 000000000..e370660bb
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/atan2 Operator.tid	
@@ -0,0 +1,15 @@
+caption: atan2
+created: 20211019222810994
+modified: 20211021222853123
+op-input: a [[selection of titles|Title Selection]] = coordinate Y (<<.place Y>>)
+op-output: the angle in radians (in [ - π , π ] ) between the positive x-axis and the ray from (0,0) to the point (x,y)
+op-parameter: coordinate X
+op-parameter-name: X
+op-purpose: returns the angle in the plane (in radians) between the positive x-axis and the ray from (0,0) to the point (x,y), for [<<.place Y>>]atan2[<<.place X>>]
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Binary Mathematics Operators]] [[Trigonometric Operators]]
+title: atan2 Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.operator-examples "atan2">>
diff --git a/editions/tw5.com/tiddlers/filters/cos Operator.tid b/editions/tw5.com/tiddlers/filters/cos Operator.tid
new file mode 100644
index 000000000..50bf87760
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/cos Operator.tid	
@@ -0,0 +1,13 @@
+caption: cos
+created: 20211019211007324
+modified: 20211021222900121
+op-input: a [[selection of titles|Title Selection]]
+op-output: the cosine of the input angles (numeric value between -1 and 1)
+op-purpose: calculate the cosine value of a list of angles (given in radians)
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: cos Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.operator-examples "cos">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/acos Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/acos Operator (Examples).tid
new file mode 100644
index 000000000..e5ab0402b
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/acos Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020142658214
+modified: 20211020142724786
+tags: [[acos Operator]] [[Operator Examples]]
+title: acos Operator (Examples)
+
+<<.operator-example 1 "[[2]acos[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[acos[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/asin Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/asin Operator (Examples).tid
new file mode 100644
index 000000000..fafbdeb8a
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/asin Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020142731829
+modified: 20211020142758974
+tags: [[Operator Examples]] [[asin Operator]]
+title: asin Operator (Examples)
+
+<<.operator-example 1 "[[2]asin[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[asin[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/atan Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/atan Operator (Examples).tid
new file mode 100644
index 000000000..3bca4ec8f
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/atan Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020141113826
+modified: 20211020141329661
+tags: [[atan2 Operator]] [[Operator Examples]]
+title: atan Operator (Examples)
+
+<<.operator-example 1 "[[2]atan[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[atan[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/atan2 Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/atan2 Operator (Examples).tid
new file mode 100644
index 000000000..06faa3f8c
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/atan2 Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020140733724
+modified: 20211020140827194
+tags: [[atan2 Operator]] [[Operator Examples]]
+title: atan2 Operator (Examples)
+
+<<.operator-example 1 "[[2]atan2[5]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[atan2[4]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/cos Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/cos Operator (Examples).tid
new file mode 100644
index 000000000..f741b059d
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/cos Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020142042072
+modified: 20211020142110929
+tags: [[Operator Examples]] [[cos Operator]]
+title: cos Operator (Examples)
+
+<<.operator-example 1 "[[2]cos[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[cos[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/sin Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/sin Operator (Examples).tid
new file mode 100644
index 000000000..b25df6699
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/sin Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020142121129
+modified: 20211020142146276
+tags: [[Operator Examples]] [[sin Operator]]
+title: sin Operator (Examples)
+
+<<.operator-example 1 "[[2]sin[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[sin[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/examples/tan Operator (Examples).tid b/editions/tw5.com/tiddlers/filters/examples/tan Operator (Examples).tid
new file mode 100644
index 000000000..da9e0d0c2
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/examples/tan Operator (Examples).tid	
@@ -0,0 +1,7 @@
+created: 20211020142158187
+modified: 20211020142222782
+tags: [[Operator Examples]] [[tan Operator]]
+title: tan Operator (Examples)
+
+<<.operator-example 1 "[[2]tan[]]">>
+<<.operator-example 2 "=1 =2 =3 =4 +[tan[]]">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/sin Operator.tid b/editions/tw5.com/tiddlers/filters/sin Operator.tid
new file mode 100644
index 000000000..9e7e1efc4
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/sin Operator.tid	
@@ -0,0 +1,13 @@
+caption: sin
+created: 20211019203650938
+modified: 20211021222816944
+op-input: a [[selection of titles|Title Selection]]
+op-output: the sine of the input angles (numeric value between -1 and 1)
+op-purpose: calculate the sine value of a list of angles (given in radians)
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: sin Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.operator-examples "sin">>
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/filters/tan Operator.tid b/editions/tw5.com/tiddlers/filters/tan Operator.tid
new file mode 100644
index 000000000..bf7ca14df
--- /dev/null
+++ b/editions/tw5.com/tiddlers/filters/tan Operator.tid	
@@ -0,0 +1,13 @@
+caption: tan
+created: 20211019211156303
+modified: 20211021222828332
+op-input: a [[selection of titles|Title Selection]]
+op-output: the tangent of the input angles
+op-purpose: calculate the tangent value of a list of angles (given in radians)
+tags: [[Filter Operators]] [[Mathematics Operators]] [[Trigonometric Operators]] [[Unary Mathematics Operators]]
+title: tan Operator
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.1.21">> See [[Mathematics Operators]] for an overview.
+
+<<.operator-examples "tan">>
\ No newline at end of file