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Monday, February 20, 2006

Sisyphus' Bloggon the Blog 1

(Moved the post on to here from my own blog) 2/17/2006 05:11:00 PM

I honestly forgot we were getting our pre-test today, for marks! If I had remembered, things would be different. Well... not really, just an excuse. Today was a real learning experience for me, I really enjoyed the class. After we were done the test, we got into groups of three or four and went over the questions before handing them in. By discussing, and conversing about the answers made me understand a whole lot more. What Mr.K had said is true, "learning is a conversation." In our group, there was this one question where one of us had it right but we agreed on the wrong one! We made a few more mistakes, but it was just the little things that would've costed us marks half marks.

For example:

- I didn't check if it was correct in the given interval where 450 < x < 630 . Instead I just put a related angle answer 90 < x < 270, which was < 360.

- I found what the period was by looking from the origin, instead of the length in units between the max and min values which was 8. The period I thought was π/3, when thinking B was 6 all because I looked at it from the origin.

- When I labelled the graph I sketeched x and y for the two axis, but x was suppose to be time, and y was suppose to be P, as the question stated. Also there was a classmate that made quite the observation that Mr.K hadn't even seen, she said that time can't be negative, so it was only proper to draw a positive graph.

Next time, I'll remember to be more careful and aware of what the question asks. Good thing it was just a pre-test, because I'll make up for it on the real test. Here's hoping!

Blogging Prompt Response

"We've learned how to measure angles using both radians and degrees. Blog a brief paragraph identifing ways in which these two types of measurement are similar. Blog a second paragraph outlining the ways in which they are different. "

Both radians and degrees are related by being both a mesurement of angles. They were both made by mathemeticians and they are two of three modes found on a scientific calculator, with other one being graduates. By knowing an angle in radians, we are able to find out the what the angle is in with degrees, and vice versa.

Radians and degrees differ by how the angles are measured.
Radians is measured by taking the radius of a circle and using the length of the radius to wrap around the arc and coming back to the center point. This happens approx. 6.28 times for every circle, known as 2π, so half the circle is π (approx. 3.14).
Degrees is measured by the circle being evenly cut into 360, so there are 360 degrees in a circle, and 180 in a half circle. People came up with this concept because 360 has many factors in which it can be divided to evenly without remainders compared to other numbers.

π = 180 degrees = half circle
We can use this proportion to convert one angle of measurement to the other.

And, here's my Pi picture...

A Pi T-Shirt! Made out of 3.1415926...etc. Pretty cool. Gives me a brilliant idea of making a shirt with math formulas and going into it for a test. Imagine that, it'll surely help everyone.

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