Andy Schleb's scribe post

We started the class with the Supercorrection Follow-up test. That took the first 30 minutes of class. After that, Mr. Obrien put up 7 problems from the homework on the board. He let us go up to the board and do them, and then we went over each one.

A few key things:

• Use pythagorus to convert sin to cos (sin^2+cos^2=1), so (sin^2=1-cos^2, and vice-versa)

• Remember arithmetic (multiply/dividing fractions, equalizing denominators)

We then began work on a worksheet with four problems on it, to try and understand proofs. The goal was to turn the left hand side of the equation into the right hand side.

Finally, we had a class challenge in which we were given sections of trigonometric proofs. We had to arrange the in the correct order. It was a fun class!

Scribe post 2.5.10

Well today we started with a small class, which was very surprising. However, as the class went along, more people filed in. AT the start of the class we had a fun warm-up in which we attempted a quizlet and Mr. Obrien tried to stump us BUT HE DIDN'T. We are much better than his expectations. After our warm-up, we began work on going over problem 108 on our homework.

Notes on Trig. Functions

We then conducted an experiment using this neat function program on the internet.

It was a nice visual!

Finally, Mr. Obrien allowed us to do a cosine version of the above applet:

Pre-AP Calc 10/19/09

Class summary and notes!

The first 2o (it was ACTUALLY 25) minutes of class we spent taking the Suppercorrection quiz. Then we worked in our books on page 134, going over a matching-function-to-equation exercise. We saw the definition of polynomial function, which we won't need to learn, phew (it's REALLY complicated-looking). Then we went on to learning about polynomial functions. WolframAlpha!

•Linear functions are a special type of polynomial functions

•Every polynomial function has the property that they always are ARN

•As x approaches infinity, the function itself also approaches infinity

•As x approaches -infinity, the function also approaches -infinity.

•An odd degree means that the end lines go in opposite directions.

•An even amount of turning points means the end lines go in opposite directions.

•The amount of turning points is AT MOST one less than the exponent.

•Double roots (or roots with multiplicity).

•Even routes make a smooch.