February 26, 2009

Precalc:
Today we worked on an activity to discover how to write equations of given secant, cosecant, tangent, and cotangent functions. To download a blank copy of this worksheet, click here.

To download a competed version with correct answers, click here.

Download the completed version and then compare it with your sheet. Are there any differences? What caused these differences? Are they necessarily wrong?

Homework tonight:

Worksheet 2

Algebra II:

Double Synthetic Division!!!

Don't get too discouraged, remember, all you're doing is synthetic division twice. Break up your polynomial into factors one by one. And ~ don't forget check if quotients that are quadratics are factorable!!!

Homework:
p 30 - all questions under III (1-3)

Feb. 25th - 3 days of February left...

Did you know...?
On this day in 1943 Beatles guitarist George Harrison was born in Liverpool, England.
and...
In 1964 Cassius Clay (who later changed his name to Muhammad Ali) became the world heavyweight boxing champion by defeating Sonny Liston in Miami Beach.

Precalc:
Today we talked about the cotangent function and how it relates to the tangent function.

Homework:
Worksheet 1 (will be added soon)

Algebra II:
Today we went over synthetic division and the definition of "zeros." For those of you who forget, a zero is solution for 'x' that will make a polynomial equal to zero.

Ex: -2 is a zero for the polynomial x^2 + 5x + 6 because if you substitute -2 in for x, the polynomial equals zero, which also means that (x + 2) is a factor of this polynomial.

For help with synthetic division (and long division) the powerpoint used in class is available for download here.

Feb 24th - Mardi Gras!

Precalc :

Today we covered the graph y = atan(bx - c) + d

Homework is on the schedule --> #2

notes:  4.6 day 2.

Long division of polynomials

Here's a gift for you all:
The solution to problem 8! Fullscreen here


Here's a sample long division problem on p26. The first video is how to find the solution, and the second is how to check it.

Fullscreen


Fullscreen

Sample problem using tons of tools

I think this problem, or one similar to it, was on that factor frenzy sheet we did last week. Here are two different ways of approaching the problem, the first starts with the difference of squares, and the second starts with the difference of cubes.

Video 1:
fullscreen here


Video 2:
fullscreen here

Factoring using diff. of squares

Here's another video..
fullscreen here

Solve for x by grouping

Here's number 2 in the series of new algebra videos. Remember, if you want to see fullscreen, click the icon at the bottom right of the window or click this link.

Solve for x using diff. of squares