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Saturday, October 01, 2005

ssh ssh scribe

Well due to my problem logging in yesterday, I only had the chance to post this up today so I’m sorry guys!

So I just knew on Friday morning that I was the scribe and I was like whoa! I didn’t even get to prepare but that’s how life is right.
Anyways, I hope you guys learn at lease something from my post even though I’m not good at this alright?!

So yesterday in Pre-Cal class, we started off by doing what was Mr. K have told us to do which were written on the board.
The first thing that we had to do was solving for θ.
Example:
5 COS θ -2 = 0
=> to solve this, you bring the -2 to the other side and so the sign becomes positive. Divide both side by 5 so the two 5s cancel. Using your calculator, press second function times the quotient of 2 and 5. then there's the answer!
So here’s how it’s going to look like. . .



BUT! There are supposed to be 2 answers for this equation. To get the other one, because it’s on the Quadrant 1 or 2, subtract 360˚by 66.4˚ and the answer is 293.6˚.

The things we learned too on Friday were:




SINE GREATER THAN ONE DEOSNT EXIST!

Solving these triangles is called ambiguous way which means open to more than one interpretation.

Also in class on Friday, we solved triangles by using Law of Sines.
The formula for the Law of Sines can be any of the following:




Example:



the question is - is it going to be sunny or cloudy tomorrow?
In mathematics, since you don’t know which one, solve both.

because you all want to know what the meaning for delta...here it is

DELTA - a finite increment in a variable. Also delta is the fourth letter of the Greek alphabet.
In the Word History: A Greek letter sits at the mouth of many rivers. Noticing the resemblance between the island formed by sediment at the mouth of a river such as the Nile and the triangular shape of their letter delta ( ), the Greeks gave the name delta to such an island. English borrowed this sense from Greek, although the word delta appeared first in English as the name of the letter, in a work written possibly around 1200. The sense “alluvial deposit” is not recorded until 1555, when delta is used with reference to the Nile River delta.

And the very last thing we did in class on friday was we went through some questions in exercise 9 and our class found out that the distance formula is same thing as the Pythagorean Theorem.

So I guess this is already the end of it (-: And DON’T forget guys, on Monday we’re going to do some word problems on what we did on Friday. Tuesday and Wednesday, Mr. K is going to be away. Pre-test on Tuesday!

before i forget, the next scribe will be Jennie S.

3 Comments:

At 10/01/2005 8:18 PM, Blogger Larisap said...

wow, crazy job jamilyn !

 
At 10/01/2005 9:23 PM, Blogger Richy said...

Excellent Job. I like how the visuals just tell you what's been going on at class. Haha. Very Excellent.

 
At 10/01/2005 10:53 PM, Blogger AichelleS. said...

hey Richard we both lost so it's a tie :Þ Larisa won!!
Jamilyn that was awesome!!!!!!!!!!!

 

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