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Type: Posts; User: muckyMuckMan

1. ## Thread: Random Questions, Differential Equations

by muckyMuckMan
Replies
4
Views
654

### For the first one, do what jonmack did by...

For the first one, do what jonmack did by substituting v = x - y + 3. When you take the derivative of both sides this equation
dv/dx = 1 - dy/dx.

So,

v = x - y + 3 and dy/dx = 1 - dv/dx ...
2. ## Thread: Need to find Coordinates

by muckyMuckMan
Replies
4
Views
2,550

### Let's use this naming convension instead: A and B...

Let's use this naming convension instead: A and B are your known points, w is your known angle, d is your known distance, C is your unknown point. Make sure you redraw your graph with this in mind....
3. ## Thread: is this true?

by muckyMuckMan
Replies
21
Views
2,745

### Haha, well I tried ericlin's code out for the...

Haha, well I tried ericlin's code out for the heck of it, and I got n=54.

Anyways, this is where the problem lies, using simple code will usually give you erroneous answers when doing these...
4. ## Thread: is this true?

by muckyMuckMan
Replies
21
Views
2,745

### infinite

If it's going to take you an infinite amount of steps then you won't hit the wall. I say this because taking an infinite amount of steps means your going to be taking steps forever.

Physically,...
5. ## Thread: y = m*x+b ( something about equations of lines )

by muckyMuckMan
Replies
23
Views
4,163

### SIDE NOTE: For those of you who are wondering,...

SIDE NOTE:
For those of you who are wondering, "gradient of a line" is synonymous with "slope of a line".

by muckyMuckMan
Replies
3
Views
744

### You're welcome. :D

You're welcome. :D

by muckyMuckMan
Replies
3
Views
744

### Unless you can see a way to just straight out...

Unless you can see a way to just straight out factor this shiznick, I would use the quadratic formula. Which is what I did.

Just for reminder, the quadratic formula is

for the equation ax^2 +...
8. ## Thread: API lines to mouse position

by muckyMuckMan
Replies
4
Views
1,284

### Yes, of course it's possible to rotate linear...

Yes, of course it's possible to rotate linear functions. In fact it's possible to rotate any type of function programatically. Rotating is used all the time in 3D and sometimes in 2D as well. The...
9. ## Thread: Need a little help with a limit/trig. problem

by muckyMuckMan
Replies
1
Views
2,859

### 1.) If you are in Calculus I, then you will...

1.) If you are in Calculus I, then you will probably have to apply the "Squeeze Theorem" to find the limit of sin(7x)/11x as x approaches zero. If you're in Calculus II, then you can simply use...
10. ## Thread: checking collision with math

by muckyMuckMan
Replies
1
Views
1,153

http://www.flipcode.com/tpractice/issue01.shtml

So from what I gather, using a quadratic equation, we can find the time when...
11. ## Thread: Incredibly Easy Physics and Gravity!!!!

by muckyMuckMan
Replies
25
Views
5,250

### Swwwoooooossshhhh! :D

Swwwoooooossshhhh!

:D
12. ## Thread: raising to the nth power

by muckyMuckMan
Replies
1
Views
1,014

### Try Math.pow(base, exponent); In your...

Try

Math.pow(base, exponent);

In your case you can do

Math.pow(1+i, n);

by muckyMuckMan
Replies
3
Views
957

a = <-3, -1, 5>
b = <1, 4, -3>

// Cross Product
a X b = -17i - 4j - 11k
14. ## Thread: how much trig is in calculus?

by muckyMuckMan
Replies
7
Views
1,966

### It depends on what kind of calculus you are...

It depends on what kind of calculus you are taking. Business calculus? Calculus with transcedental functions? In business calculus you don't deal with trig much. Calculus with trascendental functions...
15. ## Thread: Formal Definition of Limit

by muckyMuckMan
Replies
3
Views
2,245

### This is probably a little to late but.... ...

This is probably a little to late but....

Using the formal definition of a limit (the epsilon-delta definition - look it up):

lim (3x+2)=5
x->1

Show that for all epsilon > 0, there...

by muckyMuckMan
Replies
6
Views
1,075

### Glad I can help. Heh..teachers, why can't they...

Glad I can help. Heh..teachers, why can't they just tell you? Huh? :) Anywho, you should do a search for "imaginary numbers" and/or "complex numbers" for some basics and such about "i".

There's...

by muckyMuckMan
Replies
4
Views
910

### There are two vector classes on this site: ...

There are two vector classes on this site:

http://www20.brinkster.com/ahab/library/index.htm

by muckyMuckMan
Replies
6
Views
1,075

### Hey, you're the moderator. Tell the admin to...

Hey, you're the moderator. Tell the admin to enable the superscript and subscript tags (and possibly the font tag for use with the "symbol" font). :D

Is that x^2 = -4 (this means x squared equals...
19. ## Thread: Resolving Absolute Numbers in MX?

by muckyMuckMan
Replies
1
Views
1,011

### Math.abs(number)

Math.abs(number)
20. ## Thread: prove the identity

by muckyMuckMan
Replies
2
Views
1,282

### No kidding, the moderator or admin should turn on...

No kidding, the moderator or admin should turn on html code so we can use superscripts, subscripts, and other things to be able to communicate better with eachother.

Anyways,

cot(x)...

by muckyMuckMan
Replies
5
Views
2,147

### sec^2(x) - 4 = 0 Use the secant/tangent...

sec^2(x) - 4 = 0

Use the secant/tangent Pythagorean identity:
(sec x)^2 = (tan x)^2 + 1

So,
[(tan x)^2 + 1] - 4 = 0
(tan x)^2 - 3 = 0
(tan x)^2 = 3
sqrt(tan^2(x)) = +/-sqrt(3)
22. ## Thread: how do you put a never ending decimal into a fraction?

by muckyMuckMan
Replies
3
Views
2,433

### If you want to find a fraction to practically any...

If you want to find a fraction to practically any decimal number using Flash, I have written a decimal to fraction (mixed fractions too) convertion prototype. You can get it here:...

by muckyMuckMan
Replies
1
Views
7,664

### Well duh!

Ah!! Duh, I finally got it. It ends up I was doing it right all along. I just was doing some funky algebra at the end. Here's how I did it if anyone's interested. Hehe, I also made a Flash demo so I...
24. ## Thread: dynamic text and speed

by muckyMuckMan
Replies
1
Views
1,140

### You could just assign variables to dynamic text...

You could just assign variables to dynamic text fields.

Try this:

// Create some text fields to display your variables
_root.createTextField("tfGravity", 1, 10, 10, 40, 20);...

by muckyMuckMan
Replies
1
Views
7,664

### Hi, I was just reviewing some calc problems and...

Hi, I was just reviewing some calc problems and came across this one. Can anyone help me understand how this problem is to be solved? (Hints, tips, or whatever)
Minimum Length:
Two factories are...
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