Update index.md

dlfivefifty · dlfivefifty · commit 18b31bec0597 · 2022-07-05T11:54:41.000+01:00
diff --git a/docs/src/index.md b/docs/src/index.md
@@ -10,4 +10,7 @@ julia> using ClassicalOrthogonalPolynomials
 
 julia> chebyshevt(5, 0.1) # T_5(0.1) == cos(5acos(0.1))
 0.48016
+
+julia> chebyshevu(5, 0.1) # U_5(0.1) == sin(6acos(0.1))/sin(acos(0.1))
+0.56832
 ```
