vector help

[spin]

http://img132.imageshack.us/img132/9596/wtfvectorsit5.jpg

ok seriously how is that not right.

A> will have the components of (Ax, 0) (its on the x axis)
B> will have the components of (Bx, By)
C> is the sum of A> and B>, therefore (Ax + Bx, Ay + By). Ay = 0.

my first guess was Acos(theta) + Bcos(theta), Asin(theta) + Bsin(theta) but it gave me the feedback of "The second component is not in terms of A" which is retarded because the sine of 0 is fucking 0.

i hate how all math/physics (this is for physics) classes are doing this online homework bullshit. pathetic.

[Streetwolf]

Wouldn't the x-coord just be B*cos(theta) + Ax?

[Howard_Roark]

Everything seems right except x-cord. Shouldn't it be A + B cos(theta)? Your Cy seems right though.

[spin]

Everything seems right except x-cord. Shouldn't it be A + B cos(theta)? Your Cy seems right though.
doy. thanks.

[Streetwolf]

Oh ya thank him. He obviously copied me :p

[spin]

you prolly just posted at the ssame time ;/

thx tho :)

[Howard_Roark]

Heh, Streetwolf did beat me. Thank him.

[Vanquish]

Vector was the best demo EVAR

[tice]

masteringphysics is so awful.

I'm sorry for your pain dc I felt it last Fall semester.

[azul]

I know it's already been answered for you, but I'd just like to point out that A doesn't involve the angle theta in the first place. Gotta keep an eye out for those things. Sometimes setting up the problem can be harder than the math itself.

[Streetwolf]

You also need the unit vector 'i' - or 'x' in this case - because otherwise you have a 1x2 matrix instead of a 1x1 which you need.

[spin]

Sometimes setting up the problem can be harder than the math itself.
yeah i just figured it was similar to the previous problem :(

anyways, i got a test on this stuff on thursday, but im more worried about 3d conics and cylindrical/spherical coordinates :|

[necro]

AHHHH MASTERING PHYSICS IS THE DEVIL. THAT PROGRAM MADE ME WANT TO DROWN MYSELF ON A DAILY BASIS.

[spin]

http://img59.imageshack.us/img59/7696/wtfvectors2mp2.jpg

seriously...last time i checked a vector has one x coordinate and one y coordinate.

i really dont get this problem...

[Streetwolf]

Maybe a typo and meant -19.5?

[dook]

it's the european version, duh. other questions? call the hotline 1.800.555.5555 for 3,99 per minute.

[spin]

Maybe a typo and meant -19.5?
thats what im thinking. ill give it a shot later. but im thinking that a billion other people would have emailed my professor about that so :/

[Streetwolf]

Or you're the only one who starts his homework on a Saturday.

[spin]

due tomorrow at 4pm :/

[Streetwolf]

So start it at 3PM tomorrow :)

Edit: On closer inspection, that might not be a comma at all. It definitely does NOT look like the other comma which almost immediately follows it...

[azul]

Yes, but notice that the Bx = .... and By = .... are images themselves, similar to on wikipedia, ie. "The magnitude of the cross product is defined as http://upload.wikimedia.org/math/3/4/f/34fcebce07b0d9c2900062a971774ac8.png", made of some other font and not part of the Times New Roman type around it

[Howard_Roark]

That's a typo.

[Telos]

just e-mail me your info and paypal me to get an A in physics :P

[Edy]

euros use , instead of . , so its probably a .

[spin]

it was 19.5. i aced the first test so i dont need any help :p i had physics in high school so im already good. thx tho.