build locally, not with CI

CwJ/precalc/calculator.jmd

@@ -1,4 +1,4 @@
-# Replacing the calculator with a computer
+# From calculator to computer
 
 
 ```julia; echo=false;
@@ -6,7 +6,7 @@ using CalculusWithJulia
 using CalculusWithJulia.WeaveSupport
 
 const frontmatter = (
-        title = "Replacing the calculator with a computer",
+        title = "From calculator to computer",
         description = "Calculus with Julia: Replacing the calculator with a computer",
         tags = ["CalculusWithJulia", "precalc", "replacing the calculator with a computer"],
 );
@@ -14,6 +14,7 @@ const frontmatter = (
 nothing
 ```
 
+
 Let us consider a basic calculator with buttons to add, subtract,
 multiply, divide, and take square roots. Using such a simple thing is
 certainly familiar for any reader of these notes. Indeed, a
@@ -934,6 +935,21 @@ val = sind(52)
 numericq(val)
 ```
 
+###### Question
+
+What is the value of
+
+```math
+\frac{sin(pi/3) - 1/2}{pi/3 - pi/6}
+```
+
+```julia; hold=true; echo=false;
+val = (sin(pi/3) - 1/2)/(pi/3 - pi/6)
+numericq(val)
+```
+
+
+
 ###### Question