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Wednesday, September 28, 2005

My First Time As Scribe

Okay, I'm not really good at explaining things but I hope all of you will get something out of this.

So today at the beginning of class, we got our quadratic functions test back and corrected the questions people had most problems with. Then we started working with different equations and graphs for sin(x) in our graphing calculators. He talked about the sinusoidal axis and the affect it has on the graph.

For example:

y = sin(x) + 1

+1 would be the sinusoidal axis and would make the sine wave rise +1 units.

Another thing he talked about was when you plug in 2nd sin (1.5) in the calculator it won't work because the highest number you could put in would be 1(90 degrees). There is no such angle for 2nd sine (1.5).

sine input angle - output verticle length
2nd sine input verticle length - output angle

The he told us to graph the equation y = 3 sin x + 2. The x-intercepts would remain the same for the graph as it would for y = sin x but the y - coordinates would be tripled because you'd be miltiplying it with the original equation. Also don't forget to raise it two units because of the sinusoidal axis.

Also remember what Mr. K told us in class today so you don't lose marks. Always label your x-axis and your y-axis, scale your graphs, and add the arrowheads.

So hopefully you all could get what I'm saying here and so the next scribe will be ...rannell.


At 9/28/2005 10:18 PM, Blogger AichelleS. said...

you made good points

At 9/28/2005 10:22 PM, Blogger Richy said...

YAY. The scribe is here!!! LOL SO anyways. You covered practically everything during class and that's ok and now I understand trig again. Hahaha. K. I'm out.

At 9/28/2005 10:25 PM, Blogger RoselS said...

great job jess!

At 9/28/2005 11:03 PM, Blogger KAT L. said...

awesome job ! =)


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