I am in Precalculus and we're talking about this stuff!!! AH! Math in college is more difficult than the same level in high school tho. Don't really know why that is... ANYWAY SAL IM GLAD YOU HAVE ALL THIS FANCY NEW EQUIPTMENT I AM SO GLAD YOU ARE DOING WHAT YOU DO!!! THANKKKK YOOOOUUU!!!! I always *try* to watch your videos before we cover those topics in my math class, and it helps make my life easier!!!!!
Sir respect... Just dont have words.. From 1 and a half months my basics were not clear and was getting dragged in the class lectures.. so happy.. A1 sir A1..
Every teacher I have ever had taught math wrong. Thanks you very much for finally teaching things to me the proper way, so that I can actually solve problems. On a side note, why does every single math teacher I have ever met or learned from teach false math? Why do they not show us how to do the actual work, why do they ensure we will fail?
Rene Descartes --cartesian coordinate plane karl friedrich gauss -- polar coordinate system the rise and run , slope - and y- intercept are really quite influential.
NO. This is a very good example of Polar coordinates. I just love it.... It's not Cal III. Cal 3 somehow is kinda easy. this is Cal 2. You gonna do it if you are in engineering or CIS....You need to avoid calculator if you want the answer in xPi over y where y can be any constant except 0. Good luck hahaaha....
excellent explanation!, but in polar coordinates why we just derivative r = rer why we don't derivative the second component which is θeθ. because we have two component rer + θeθ , Thanks
Visually, we know a tangent represents the slope of the line on a unity circle. For a tangent of 45 degrees with a positive slope of 1 in the 1st quadrant, the inverse tangent has a negative slope of minus 1 and is the same as its reflection in the 4th quadrant below it, also known as the arctangent. The continuation of the positive slope in the 3rd quadrant would be the cotangent.
@Anvar Ashurov EXTREMELY important. I'm more curious as to why you don't know x and y axis in Precalc, that should have been taught over and over since algebra 1. Much of calc bc is the relationship between x and y (im in ap calc bc atm).
@RASHTG actually it just depends on the school. I am in precalculus and we are covering this topic. Every math book is different buddy!!! Anyway, WHO CARES??? ITS MATH ITS ALL RELATED!!!
@goat1221 Haha. Okay. I did not go to high school in US so I don't know. As I said earlier, I never took Precalculus or trig or anything like that. They put me in cal after my placement test. Education is different everywhere. In my country, we covered a little bit of everything ( trig, CAL1, 2, 3, Differential Equation). That gives me a very strong base in math. Sorry, I'm not a poor guy. I'm a happy one. I'm in the top 3 in my university so yeah...
how do u get that ti 85 on a computer, i use my calc so much i keep replacing the batteries. it would be nice to have it on my computer. if u happen to know, please let me know. with thanks
@paulsimage lol i think its because it was summer break and hot as hell in the house i forgot how nice it was to be naked and do homework... its starting to get cold here
@virginialikesyou Ok. I can't know that. I never did precalculus. I started math with Calculus 1 and Im taking higher level math ....so I don't know, buddy.. :) :)
where did arctan and in the prev. video arccos come from. i dont know how to deal with that. i dont mean to complain, but i've seen all the prev. videos and they came out like ninjas.
so fukin easy survey coodinaes are simular but whit ruler and millimeter are inc so coordenats usually start Y:20,000 X:50,000 n y is up n there are minutes ,seconds on ghones so mind blowin
Shouldn't it be (theta, r), rather than (r, theta)? I mean, First you tell someone which direction (angle) to point in, and then you tell them how far to go... :\ And you'd say "For angle theta, the radius r equals some value based on theta." Why confuse people? Theta is essentially, to some degree, the equivalent of x from Cartesian coordinates. Which is to say, based on the input (x / theta), the equation yields (y / r), respectively... Yes?
Dear Mr. Khan, the reason I stopped by is because someone asked me to make tutorials on Polar Coordinates. You must know that the polar point (5, 53.13°) is only close to the Cartesian point (3, 4). Those two points are NOT EQUAL. Rover would have never reached Mars. I have restrained from writing for a long time. Math cannot be sloppy. Do not mean to offend. But students must learn properly. P.S., your sine double angle proof would turn off anyone going into math.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
in ten minutes this guy taught me what my math teacher tried to teach me in 3 hours
Thats why I love khan academy.
That's khan academy
put it on 2x speed and you get it in 5 minutes 👈😎👈
Exactly bro 😂
@@Em-cp9wh and what if I put it down to 100x speed?
I am in Precalculus and we're talking about this stuff!!! AH! Math in college is more difficult than the same level in high school tho. Don't really know why that is... ANYWAY SAL IM GLAD YOU HAVE ALL THIS FANCY NEW EQUIPTMENT I AM SO GLAD YOU ARE DOING WHAT YOU DO!!! THANKKKK YOOOOUUU!!!! I always *try* to watch your videos before we cover those topics in my math class, and it helps make my life easier!!!!!
I was looking for lectures of polar graphs, and then I remembered the word "Khan". And here you are, contributing to my education a lot!!
I go to Drexel University, I went to a good high school, and Calc II is the first time I've even seen these.
What??? Lucky, I'm in precal in highschool
@@allenburt1475 Really? I as well never saw this until calc 2
Sir respect... Just dont have words.. From 1 and a half months my basics were not clear and was getting dragged in the class lectures.. so happy.. A1 sir A1..
Wait, it was recorded 13 years ago? Man, sound is kinda good for those years, didn't realise the time 💀
Thank you so much for the information
Well Sal, you've surely come a long way. Glad to see you been teaching since soo long!
thank u that helped me so much , 10 minutes with u is better then 4 hours with my lecturer
5:45 A wild calculator appears!
😂😂
Pokemon go
this is where i wish you can fast forward youtube videos to watch at 2x speed or something... [not skip, but just play faster w/ sound]
Well now you can
Now you can
Every teacher I have ever had taught math wrong. Thanks you very much for finally teaching things to me the proper way, so that I can actually solve problems.
On a side note, why does every single math teacher I have ever met or learned from teach false math? Why do they not show us how to do the actual work, why do they ensure we will fail?
You are an amazing teacher thank you for your videos 🥺❤️
Remember to use law of cosines and law of sines for non right angled triangles
yeah. He explains it in a very easy way. I know what it is and I can tell he knew what he was doing. Good Job
could you maybe make a video on solving trig identites
A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed.
...and i'm going to do it in magenta. :P
this is so much better than how our teacher taught it, now it makes sense
Rene Descartes --cartesian coordinate plane
karl friedrich gauss -- polar coordinate system
the rise and run , slope - and y- intercept are really quite influential.
If I was a calc teacher, I would just play this guys vids, easiest job ever.
NO. This is a very good example of Polar coordinates. I just love it.... It's not Cal III. Cal 3 somehow is kinda easy. this is Cal 2. You gonna do it if you are in engineering or CIS....You need to avoid calculator if you want the answer in xPi over y where y can be any constant except 0. Good luck hahaaha....
thank you so much you just saved my life..that trig test was gonna murder me.
Also, you can consider; (Some people have) sin=per/hyp, (curly brown hair) cos=base/hyp, (through proper brushing) tan=per/base instead of soh cah toa
yean no pretty sure everyone and their mother uses soh cah toa
Watching this video is WAY easier than sitting on a room listening to a professor's lecture.
You make things really easy. My professors make things completely complicated
Are you really happy to make this world a better place please please reply I will wait
Khan no one but one million thanks.
Very useful, great and easy to understand.
Khan God bless you life, your job, your family and your person.
Thanks.
Thank you so much salman. Will helps me pass the test tomorrow.
correction on the P.S. sin (A+B) proof
Bro u must be a student back then. What are u doing right now?
@@talhaansari493 lmao i wanna know
12 years ago
one of the videos on polar coordinates that I actually understood. Thankyou
excellent explanation!, but in polar coordinates why we just derivative r = rer why we don't derivative the second component which is θeθ.
because we have two component rer + θeθ , Thanks
You really deserve Nobel prize. You really do. Thank you so much for every hard works!
Visually, we know a tangent represents the slope of the line on a unity circle. For a tangent of 45 degrees with a positive slope of 1 in the 1st quadrant, the inverse tangent has a negative slope of minus 1 and is the same as its reflection in the 4th quadrant below it, also known as the arctangent. The continuation of the positive slope in the 3rd quadrant would be the cotangent.
This really helped me thank you so much
Thank You, your explanations are immensely intelligible
I wish my teachers explained calculus this clearly...
@Anvar Ashurov
EXTREMELY important. I'm more curious as to why you don't know x and y axis in Precalc, that should have been taught over and over since algebra 1. Much of calc bc is the relationship between x and y (im in ap calc bc atm).
@RASHTG actually it just depends on the school. I am in precalculus and we are covering this topic. Every math book is different buddy!!! Anyway, WHO CARES??? ITS MATH ITS ALL RELATED!!!
@goat1221 Haha. Okay. I did not go to high school in US so I don't know. As I said earlier, I never took Precalculus or trig or anything like that. They put me in cal after my placement test. Education is different everywhere. In my country, we covered a little bit of everything ( trig, CAL1, 2, 3, Differential Equation). That gives me a very strong base in math. Sorry, I'm not a poor guy. I'm a happy one. I'm in the top 3 in my university so yeah...
Today is my exam and am watching this🙂 with 4 other chaps
"Normal people have not memorized the arctan of 4/3"
all my classmates who know its value to 5 decimal places *laughs in indian education system*
Thank you 👌
As possible to solve cosA=b'2+c'2-a'2/2bc by method partial Derivative
imagine my math teacher taugh like this... how much time iwould save
have you translated your videos?
do you have some videos about the tangent line of parametric equations? please send the link
I positively love most Khan Academy math videos, but this one (started off nicely) was needlessly confusing (shades of double-talk).
And just like that it all makes sense.
Anyone know where that TI-85 emulator program that Sal uses at 6:00 can be obtained?
nice video
where did you get the ti85? I wanna have the same one :(
how do u get that ti 85 on a computer, i use my calc so much i keep replacing the batteries. it would be nice to have it on my computer.
if u happen to know, please let me know.
with thanks
flamenballerG37 Program it yourself
That's one bad ass calculator.
Thank you very much :)
wait until you have to find the area under the curve in polar.. then is calc.
I dont know what calculus 2 is, but if you take single variable course you will take polar coordinates
Sir i m unable to find Spherical Polar coordinates system lessons.... Urgently in need... Please give me link here if available
It depends on which calculus course you taking
im learnin this and im in precalc
thnq !
The best!
Find the polar coordinates of the rectangular point (3, 4). The answer is (5, arctan 4/3). Sorry you can't understand that.
What if the spot is right on the Y axis?
Then Y coordinate is the r and theta is 90 degrees if y is positive
If y is negative then theta is 270 degrees
I’m in high school. What’s the chance I see this kind of stuff before grade 12?
I'm in grade 11 and we are doing this in precal so I would say pretty high
3 4 5 right triangle
@paulsimage
lol i think its because it was summer break and hot as hell in the house
i forgot how nice it was to be naked and do homework... its starting to get cold here
yo please make this in better quality, I can barely see what you're writing on the 240p
i think thats a ti 85 emulator if i'm not mistaken
hey very cool
@virginialikesyou Ok. I can't know that. I never did precalculus. I started math with Calculus 1 and Im taking higher level math ....so I don't know, buddy.. :) :)
What program do you use?
thumbs up if rchs
You sound like Jamie Dornan!
Nobel Prize for You!
this is calculus? I'm learning this in precal honors.
crazy how a 14 year old video with 861k views has only 155 comments
im in precalc honors and we are doing this. if this is actually calc im gonna be pissed
Nope! HAHA!
only available in 240p???
this video is 12 years ago.
my bad your right.
Mindbites would be good if they didn't cut the damn videos halfway through.
#YouCanLearnAnything
where did arctan and in the prev. video arccos come from. i dont know how to deal with that. i dont mean to complain, but i've seen all the prev. videos and they came out like ninjas.
Ur the boy
oh sal, what would i do without you.
this is all very good but WHERE WILL YOU SPEND YOUR LONG ETERNITY? HE, GOD SAYS, " I WISDOM SEARCH OUT WITTY INVENTIONS"
@KHAAAAAAAAN okay dude
well if im wrong im wrong. you clearly smarter.
Are you ok?
@@MaxMustermann-pb3ny i dont think so
so fukin easy survey coodinaes are simular but whit ruler and millimeter are inc so coordenats usually start Y:20,000 X:50,000 n y is up n there are minutes ,seconds on ghones so mind blowin
What's arctan
horsecrazy2266 tangent is sin/cos arctan is the inverse cos/sin aka cotangent
luis fuentes oh my gosh thanks
luis fuentes Arctan is absolutely not the same as cotangent. Arctan is the inverse function of tangent, cotangent is the multiplicative inverse.
David Foley whaaaaaat
arctan is the same as tan^(-1). It's the inverse of tan.
Pfff, it's called: Soh Cah, Toa 2aletlo salamtak.
Soh cah Toa...TOOOOOAAAAAAA haha :P
so why am i doing it then? my teacher must be fuckin crazy
Am i the only one who likes to do homework naked??
just wondering
Shouldn't it be (theta, r), rather than (r, theta)?
I mean, First you tell someone which direction (angle) to point in, and then you tell them how far to go... :\
And you'd say "For angle theta, the radius r equals some value based on theta."
Why confuse people?
Theta is essentially, to some degree, the equivalent of x from Cartesian coordinates. Which is to say, based on the input (x / theta), the equation yields (y / r), respectively...
Yes?
Dear Mr. Khan, the reason I stopped by is because someone asked me to make tutorials on Polar Coordinates. You must know that the polar point (5, 53.13°) is only close to the Cartesian point (3, 4). Those two points are NOT EQUAL. Rover would have never reached Mars. I have restrained from writing for a long time. Math cannot be sloppy. Do not mean to offend. But students must learn properly.
P.S., your sine double angle proof would turn off anyone going into math.
polar co-ordinates in triple integrals of surfaces in and projections in my exam tomo...fuuuuuuuuuuu
wrong. You cannot do this in Precal. the teacher cannot even do a complex problem of this. I know what im talkin abt. This is Cal 2 buddy
your
@SpawnZer0 mindbites bites
Check out my video on polar coordinates too, it may help