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Wednesday, May 17, 2006 


Well then today was a one day class and the first thing we did were some quick DICTIONARY notes which were as follows:

Periodic Functions

Period: The "period" of a periodic function is a measure of how often the function repeats the same values.
For example: The period of the sin function. Y=sinX, is 2 pi.

Periodic: A function is periodic if it keeps repeating the same values.
Eg. Heartbeats on an EKG monitor.

Degree: A unit of measurment for angles. There are 360 degrees in a circle.

Radian: Another ("more natural") unit of measurment for angles. There are 2 PI radians in a circle.
Note: The radian arises from the fact that if you "wrap" the radius of any circle around its circumfrence, it will fit exactly 2 PI times.

Converting Degrees and Radians

A is an angle in degrees.
R is an angle in radians.

EXAMPLE 1: Convert 27 degrees to radians.

<<<(Note to everyone the 180 degrees cross each other out.)

EXAMPLE 2: Convert 7 PI/10 Radians to Degrees.

The Big massive circle that consists of 360 degrees is right here wit all ur angles and stuff (even tho steph already made one here it is again):

And now for my final magic trick i will be showing u a few of our basic SIN functions have fun with these and yeah have a good night!!!!!!!!! :)

Your basic SIN(x) function looks like the following picture:

You can get this image by setting your calculator to RADIANS instead of DEGREES. You go to your Y= screen the put in Y=sin(X) and u will get this beautiful image and it is the same thing as the other 4 i will show u so just watch and learn :)

Now we have the SIN(x)+2 function which looks like this:

The formula for this is: Y=sin(X) and then under this one u put Y=sin(X)+2.

Now the 2sin(x) function is as follows:

The formula for this is: Y=sin(X) and then 2sin(X)

The lighter line is 2 times bigger then the thick line.

Now here we have a -3sin(X) function:

The formula, as u would imagine, is Y=sin(X) and Y=-3sin(X)

And last but not least is the Y=sin(2X) function:

The formula for this is Y= sin(X) and Y=sin(2X).

ENJOY and love me for this cause i'm TIRED have a good night ya'll much luv!!!!!!

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Nikki this is great work! Well written text, good use of graphics showing step by step solutions to example problems. And more to come ...

This post is headed for The Scribe Post Hall Of Fame. I can't wait to see it when it's finished ... I just know it'll be a Hall of Famer!. ;-)

Congratulations Nikki!

You're in The Scribe Post Hall Of Fame!

Hi Nikki!

Congratulations on your excellent work and your induction into the Hall of Fame!!

I really found your post easy to follow!


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