function graphing

[BruceH]

You can use the 'where' function (the vertical bar symbol - |) to assign a temporary value to a variable in an expression.

For example, in the Function app in degrees mode:

• F1(X)=SIN(X+a)|a=45
• F2(X)=SIN(X+a)|a=0
  

show the effect in the graph.

Note that the variable 'a' needs to have been created before you can use it in a where value.