322

I am playing around with rotation of axes formulas and not getting it. I don't understand how this rotates anything when it is just giving you different coordinates for the SAME point in space. How can anything be rotated when it's giving the same points each time? I'm not understanding how this rotates anything. For it to be rotated then the XY coordinates in THAT system would have to match the values of the xy coordinates in its system

For example: (2x^3+5x+1)/((x^2+4)(x^2+x+2)) breaks down to (ax+b/(x^2+4))+(cx+d/(x^2+x+2)). I have been told that since the denominators are irreducible, the numerators will be either linear or constant. Now my question is for something like (2x^3+5x+1/(x^2-4)) you would make it equal (A/(x+2))+(B/(x-2)), why do assume that the numerators are constant? Why couldn't the numerators be linear like the irreducible one?

How do you put y = sinx in polar form?

Explain why you should always start with the largest angle or the largest side when using law of cosines. I don't understand why.

If the bug bang is true, after the emission of light from the hydrogen plasma, the universe was still expanding. Why would we expect to see uniform radiation if earth very well could have formed outside of this hydrogen plasma. Then we would expect to see bits of background radiation coming from one direction. People sometimes answer this question by saying that the big bang happened everywhere and that where the earth is right now was a haze of hydrogen plasma 13.7 billion years ago. I do not see how one can assume this as since the universe expands we could have formed outside of the plasma and therefore should not expect to detect uniform background radiation.

If the bug bang is true, after the emission of light from the hydrogen plasma, the universe was still expanding. Why would we expect to see uniform radiation if earth very well could have formed outside of this hydrogen plasma. Then we would expect to see bits of background radiation coming from one direction. People sometimes answer this question by saying that the big bang happened everywhere and that where the earth is right now was a haze of hydrogen plasma 13.7 billion years ago. I do not see how one can assume this as since the universe expands we could have formed outside of the plasma and therefore should not expect to detect uniform background radiation.

People who believe in the Big Bang say that this even distribution of radiation appearing at the same time is strong evidence of cosmic inflation. I don't understand why one would think that if a big bang did create the universe, then we would see the electromagnetic radiation evenly around us. I guess I am not understand this. If the bug bang happened everywhere, then why wouldn't we see this microwave radiation absolutely everywhere? Why is it reaching us no and also how do we know that the light from these distant galaxies and stars have had a certain amount of time to reach earth? This implies that the Big Bang happened at a finite point... Help me out.

Why is sqrt((sinx)^2)) |sinx|. I don't get it!

1/(x^2(sqrt(4+x^2))), x=2tanu

At the end I get 1/(4cos^2u)(2secu), I don't know if it is supposed to be a plus or minus 2secu or what. I think there has to be and absolute value sign somewhere but I am thoroughly confused because if there is one needed, I do not know why. Can someone explain this to me?

1/(x^2(sqrt(4+x^2))), x=2tanθ

1/(x^2(sqrt(4+x^2))), x=2tanθ

http://tinypic.com/r/5bbeu/8

A man from a point on the ground finds that his angle of elevation to the top of a tower is 75 degrees, he walks 100 feet closer and finds that the angle of elevation form that point is 85 degrees. How tall is the tower?

A man from a point on the ground finds that his angle of elevation to the top of a tower is 75 degrees, he walks 100 feet closer and finds that the angle of elevation form that point is 85 degrees. How tall is the tower?

I just removed a tick from my dog and am worried that I could now get lyme disease. Is this even possible? I did touch the tick with my bare hands accidentally as well. I have read that if the tick is ripped in half it can infect you and I did rip it in half with tweezers. Please let me know, thanks.

http://tinypic.com/r/2vns74l/8

http://tinypic.com/r/2vns74l/8

For example:

IF you have an equation like x^2+2x+5, you could set that equal to zero and then put it into vertex form by subtracting the constant over and then proceeding with the rest of the necessary stuff. Why is it that we can just set this to zero? Can someone please explain this to me.

What is the minimum insurance that an owner of a heating/plumbing business must have in California?

Below is a program that I wrote but I kind of don;t get one thing. I put a while loop in the beginning, and pretty much it says that while response's first character is y, then the program will run. I don;t quite understand then why the program initially runs, if the whole condition is WHILE response's first character is y, THEN the program will run. I am fairly new at this so be kind, thank you!

import java.util.Scanner;

public class methods {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

String response = "yes";

while(response.charAt(0)=='y'){

System.out.println("Enter password:");

String answer;

answer = input.nextLine();

System.out.println("That's" + " " + answer.equalsIgnoreCase("Noah") + ",");

System.out.println("do you wish to try again?");

response = input.nextLine();

}

}

}