Hello, everyone. Tom from everystepcalculus.com and everystepphysics.com. A and B vectors. This is Calculus 3, usually. Let’s get started. Index 8 to get to my menu. You’re going to have A anB vectors choose number two here. We’re gonna add the vectors. You have to press Alpha before you enter anything into my entry lines. Alpha 9. That’s the X value. If we have all the X and Y than just put zero in for Z. Alpha minus five alpha 7. That’s the first vector. Now we’re going to do the B vector for XYZ. Alpha 15 Alpha minus 4 Alpha 6. I always show you what you’ve entered. These arrows here are vectors; notations. I say it’s okay. Now you have all these choices. For instances, you want to subtract them, you choose number 4. Try this without this program if you want to try it. You’re going to mess up a minus sign. That’s what I always did or something. Got something wrong . number seven magnitude. The magnitude is this vector plus this vector. You have to that and then you have to take, then you have to multiply or use the under the square root sign. Square root of x squared y squared Z squared. Turns out to be twenty eight point seven four units. If you do number 8 . That’s for three vectors. I’ll ask you to enter the C vector. Scroll down here to cosine of A and B. That’s always fun to do. In other words, the angle between the vectors. That turns out to be this formula here. A times B times the magnitude. Add all this exactly on your paper. It’s just the way you do that computations yourself. Turns out to be 18.1 degrees and point 315 radians. Pretty neat, huh? everystepcalculus.com Go to site, subscribe for more videos. Thank you.