1. If it doesn't rain in the morning, I will go to the movies as A and read books or newspapers at home as B, then: If A or B.
Or:
P= it doesn't rain at the movies, Q= reading at home ┐ p-> Q
I went to town today for A and it rained for B, so: A and B are not, or not A and B.
Or:
P= going to town today, Q= raining ┐ P-> Q
If I stay, then you must leave. I will stay as the former and you will leave as the latter.
You go as A and I stay as B, so: A and B.
Look at the answer.
The answer is that the cosine of the vector PA and the normal vector N =√2/4, and the normal vector