Answer:
What the audience learns from these lines "be innocent of the knowledge dearest chuck/till thou applaud the deed" is that Macbeth is not going to tell his wife about his plan to murder Banquo until after the murder has been committed.
Step-by-step explanation:
These lines from "Macbeth" by William Shakespeare appear in act 3, scene 2, when Macbeth has already planned the murder of Banquo and he says half a true to Lady Macbeth, so when she asks for more specific details about the deal, he uses these lines to say that she shouldn't know as an act of love from him.