New one... with an easy *VECTORS* equation...
What does pic related mean? I understand that I need to find the angle where the vectors are either coming from or going to B but how and why do you know to write A->B instead of B->A or B->C instead of C->B.
Looked in the markscheme and it came up with B->A and B->C
Any reason for this?
Forget what I said... just help me answer question c if ya can
Here's a hint
AB dot BC equals the magnitude of AB times the magnitude of BC times the cosine of the angle between AB and BC
You can rearrange and solve for the angle
anyone know how to do this? completely stumped
Is the infimum of the difference greater than the difference of the infimums?
Remember how to make a vector from to points?
AB will be where the i, j and k represent the components in the x,y and z directions. Apply this to AB,AC and BC.
The magnitude of a vector is related to... you guessed it, the pythagoras theorem (at least in euclidean coordinates).
So IBCI will be equal to ((Bi-Ai)^2 + (Bj-Aj)^2 + (Bk-Ak)^2)^1/2
The last question can be answered using the definition of the dot product.
Sorry for the format, I'm on my phone.
How hard is CS?
cpp.edu
I transferred this semester from Computer Engineering, and I completely hated the intro courses to CE (Intro to Electrical Engineering).
cpp.edu
I looked at the future courses for CE and I just didn't care for them. I already completed the Math up to Differential Equations, but how much Math is involved in the CS courses? I want to work in cyber security.
>how much Math is involved in the CS courses
The most that ever comes up is a little algebra (maybe linear algebra if you're going to get real hardcore).
There's a reason people say computer science is a meme degree.
Anyone know what the name of this shape is?
pyramid