Add a missing doc (#53796)

putianyi889 · web-flow · commit 0c65f6ffde9b · 2024-05-25T00:55:33.000+02:00
diff --git a/doc/src/base/math.md b/doc/src/base/math.md
@@ -74,6 +74,7 @@ Base.Math.tand
 Base.Math.sincosd
 Base.Math.sinpi
 Base.Math.cospi
+Base.Math.tanpi
 Base.Math.sincospi
 Base.sinh(::Number)
 Base.cosh(::Number)
