Sinusoidal Functions Review

There are a number of ways to approach the sinusoidal/periodic function. We were taught to use either GRAPHMATICA or a graphing calculator.


The periodic function equation is y=Asin(Bx+C)+D and that is what you will input into the software of your choice.

A=Amplitude
B=Period (formula for period P=2(pi)/B)
C=Phase shift
D=Verticle shift

Here is a site that demonstrates those values (very usefefull to play around with it)
-http://www.ronblond.com/M12/sc.APPLET/index.html

If you are given the sinusoidal function(periodic function) and want to graph it using a calculator
1. press[mode] and make sure that it is on radian NOT degrees
2. press [y=] and input the formula Asin(Bx+C)+D (substitue numbers)
3. press [graph] and behold the squiggly lines
-you may want to adjust the windows setting to get a better picture

If the information is given in tabular data then you will have to use something called SinReg
1. press [stat] and put the data into a list
2. press [stat]-> calc then go down to something called SinReg
3. back at the home screen put in SinReg,L1,L2,Y1
4. turn on the stat plot ([2nd y=]) and press graph


And that my friends is periodic functions in a nut shell.

Exam review

Hey everybody no one posted this exam review from last week so I thought I'd put it up.
(plus I need to get some posts in, get that blogging mark up).












Good luck tomorrow...

Thursday May 21

Today the class started with a strange noise coming from the opposite side of the class (probably nemez). We are getting homework checked on exercise 4 - 3, 4, 5, 6.

*There is a probability test on Tuesday May 26.

Standard Deviation Test

Today we wrote the standard deviaton test.
"Standard Deviation is measuring "spread", closeness from the middle or average, and if every number is the same there is no deviation."

If you are studying for the exam everything you need to know about standard deviation is already on the blog... good luck.

Monday, febuary 23

Today in class we did mental math, then we were homework checked on the cake problem.

Dan is preparing to serve his rectangular cake(9" by 13"). he requires at least five large pieces of cake (4" by 3") and at least five smaller pieces of cake (2" by 2"). Create a scale drawing to show how Dan could get the most pieces from this cake with at least five of each, and the least possible waste. calculate the total waste.
As far as I could tell it is just trial and error. If you cut your cake correctly you should be left with 1" by 1" of waste.

Mr. Maks then showed us how we could do 2A with the help of a spreadsheet.

We have now been assigned question 2 A in the booklet for homework.