Trigonometry for farmers: swine and coswine...
A hillbilly was going to send his boy to school and was discussing with the principal what courses he should take.
The principal was talking about math courses and suggested he would probably later on take geometry and trigonometry.
The hillbilly heard this and said "Great! Be sure and give him lot's of that there triggernometry! He's got to be the worst shot with a rifle of anybody I have ever seen