6 Cylindrical & Spherical Coordinates

[@gdogvibes1]

Feels great knowing why equations work instead of just memorizing them. Now during a test I can reason out equations. Makes me really enjoy math.

[@PWskates]

+Cihan Barnett RIGHT, they teach it wrong in school

[@andrewrafaelkim]

PWskates this is my teacher 😂 she’s having us watch her video for class

[@ayoubsbai6339]

@@andrewrafaelkim You are lucky :D

[@lcchen3095]

That’s the gist of learning math

[@ramseshendriks2445]

One, less, you enjoy meth!? Like, what did just happen at the start of maths message! Edit: massagein

[@firas0137]

you're a LEGEND, keep up the amazing work.

[@dimbanimvula3672]

That was incredible thank you so much

[@shawnjamal9301]

This is great explanation, thank you for putting this up

[@Ensign_Cthulhu]

The bizarre thing is that they chose to "drop" phi from the Z axis down as opposed to making it the intuitive "up" from the "equator" (or in terms of elevation for telescopes, gunlaying, etc). I wonder why this was the case (apart from avoiding negative values).

[@Alinakhan0421]

Phi is the angle that is made from z- axis to the line of projection of point P. This angle goes from positive z axis to overlying x-y plane then to negative z axis and completes 180 degrees in its pathway.

[@jonydakasks]

Man..... Such an incredible teaching !!! Probalby you love what you're doing, aren't you ;) ?

[@annekeirstead1123]

Thanks, and I do love teaching math.

[@Xuul]

GREAT explanation. THANK YOU!

[@himanchalsingh1135]

such a nice explanation..

[@pabloandrade5887]

Thank you:)

[@YasmineNazmy]

Awesome explanation! Thank you!

[@michaelmatusowsky3863]

Mind adding times where you actually start talking about spherical coordinates?

[@hosseinazizi1426]

Beautifully explained. Thanks

[@varunnegi7202]

your teaching skill is great kudos to that but would've preferred a few tougher numericals.

[@buttegowda]

Thanks a lot. Very well explained.

[@SchrodingersCat637]

Thank You!!!!!

[@marked3382]

really helpful! Thank you very much!!!

[@joffiie]

Great video!

[@johnbatchler8551]

again thanks for the hieroglyphics of cal 3

[@nunonavega1043]

For some reason my uni uses the theta for different coordinate angles in spherical and cylindrical, but still very helpful video

[@Babdulrahim]

Thanks for the excellent video. Just a typo in x-y plane instead of (3 x Squre root of 2)

[@haveanicetime]

Thanks ...Nice work...Truly nice work

[@lizmariejoycesical4586]

I thought in cylindrical, it's rho,phi and z

[@caghey]

that helped a lot thanks!

[@cpw1769]

Thx!

[@rachitmanas1647]

thanks very easy to remember........

[@SamsungSamsung-ns6qe]

thanks ,very helpful.

[@user-qk5ys7wn3u]

Possible translate to language Arabic now I follow you please

[@hosseinazizi1426]

What is the reason physics guys use theta from z axis and make problems worsen

[@protostar1000]

Pretty helpful!

[@ramseshendriks2445]

Helpfull preetttttttyy!?

[@protostar1000]

@@ramseshendriks2445 Yes, very helpful back at that time!

[@JanizSuyko29]

Shouldn't phi be changing along the x-y plane while theta changing vertically? I think you accidentally interchanged phi and theta in your illustration there. Unless, it is just a matter of convention?

[@JanizSuyko29]

Sorry. It seems like my reference, Elements of Engineering Electromagnetics by N.N.Rao, uses a different convention.

[@jamesrockford2626]

Janiz Suyko You think it wouldn't be too much to ask to have consistency within math rules...but no dice....

[@williamchamberlain2263]

Lack of conventions is a pain in the arse

[@FutureAIDev2015]

I'm not sure whether my question applies here, but... Suppose you have a point (lat, lng) on a sphere of radius r, and you also have a point (lat2, lng2) directly "north" of the first point at a distance d. How do you rotate the second point on the sphere, clockwise about the first point, while keeping its distance constant?

[@ramseshendriks2445]

That's what you do from the center between them.

[@kunaldas7808]

hey whats the value of cos45* please check the video

[@annekeirstead1123]

root 2 over 2

[@elissanguyen4744]

ty!!

[@albertramirez7922]

What if your phi angle is a negative?

[@manikantaseelam7604]

She sounds like Sarah sanders 😂🤣😂🤣😂🤣😂 But her explanation is awesome

[@johnbatchler8551]

more hieroglyphics

[@noahnemes-lauzier9160]

love you anne

[@mahdirezaie891]

tnx from nice teaching !

[@johnbatchler8551]

that might get changed

[@Dark-mo7tt]

omg..i almost thought it was Hillary Clinton speaking 😂

[@bigtoe_2543]

tashW nice vape videos 😂

[@tejasreeparasa1252]

can someone tell me how we consider the range of values for theta?

[@williamchamberlain2263]

... in rads

[@egodinez123123]

Isn’t arctan restricted from -pi/2 to pi/2? 9:14

[@egodinez123123]

Yeah I get that, but she says that (3sqrt2, 7pi/4, -7) ((roe, theta, phi)) is also an acceptable answer and I disagree because like you both said arctan range is restricted from -pi/2 to pi/2. Theta should also be in between these values. 7pi/4 is greater than pi/2.

[@egodinez123123]

*did not specify range at first, but I meant to say range is restricted*

[@egodinez123123]

@@akeirsteadmath So is -pi/4 not the correct representation because theta is from to 0 to 2pi?

[@egodinez123123]

@@akeirsteadmath Why not 3pi/4?

[@egodinez123123]

@@akeirsteadmath actually I see why it would not be 3pi/4 because that not be pointing at (3,-3) 4th quadrant in xy

[@rahimulmazumdar7190]

can anybody explain me that how phai is varying from 0 to 180 degree in spherical co ordinate system..????

[@tirth5405]

Imagine r and theta (from 0 to 360) as rings. So for each phi we get a corresponding ring on the xyz plane. So now a sphere is made of rings from top to bottom right? ( i.e. phi from 0-180) If u take phi from 0-360 you are counting rings twice. (top to bottom and again bottom to top)

[@ashasmith6602]

My calc professor showed me the other day. think of a coin. Lay it flat on the xy-plane. Rotate the coin vertically. You'll see that you only need to rotate that coin half way for it to "create" a spherical shape. you've only rotated that coin 180 degrees which is why you can consider the range from 0 to pi and you could calculate for the entire sphere. Hope that helps

[@akku96696]

Great but it would be better if you start pronouncing phi as FAI

[@bobmike828]

9:30 should be 3pi/4