Graph of the sine function

[KarimBenzemaX9]

Well unfortunatley.. this doesnt help me as much as i need it to, i dont really understand how he finds where to plot the numbers, and there is no mention of vertical and horizontal shifts which is what we REALLY need to learn.

Incomplete lesson, i was expecting more.

[veronica75627]

Mind=Blown at 5:20

[b1cyxu255]

My teacher is too nice to say shes a bad teacher :( buuuuut shes a bad teacher :\



[ms1062341]

I'm taking this class next semester and I really have to make an A. :) Thanks for the help...

[420bindas]

great teacher

\

[pyariguriya29]

i am not geetin anything :((

[rhatid]

This was very good!

[taylorswiftfan4ever2]

can you make a sin wave graph with using an equation like sin2x of something like that?

[tseihtA]

I wish I could watch your videos in class. It would save me a long, pointless, two hours of my life every day.

[mephatboi]

*cop

[mephatboi]

@6:15-25 ---> cope out, so typical...

[KennyTreeHug]

Helped me a lot thanks!!!

[boytuhab]

how do you solve this? -1/2 sin x/4?

[DEEEKAYify]

If you teach in high school, everyone in your class are going to get As

[rocknfosssy]

I'm in college and my trig class doesn't have a teacher... guess who is my new professor!!??

[LuLzezRoflcopter]

My teacher is just making me watch your videos for homework now... And I'm glad

[novanovalove]

I missed the day of Pre-calc where we started graphing trig functions. This video made class bearable again!

[PotatoeSmiley]

i don't think i can like this video enough

[nitannna120194]

Pleaseeee make a video on Application of integration (volume part) :)

[Teezsa101]

YOUR VIDEOS ARE SO HELPFUL!! THANK YOU SO MUCH !

[terios01234]

if sin is a ratio why is a ratio negative?

[chickenkyu]

I must get some sleep. But I feel like watching this is so much more useful than sleep. WhaddoIdo. O___O

[jarinthemood2000]

Why are the units on the Unit circle measured in pie and pie/2... that always confuses me when trying to graph the trig functions. In other words if I was to reinvent this I would have thought to use 1,2,3....360. Can someone tell me why they decided to use pie and is there any advantage in using pie?

[kspkido]

I Love this Guy!

[neonorix]

this guy is a mouse master

[zaneb2005]

@neonorix hey i just wanted to let you know man that salman khan- the guy in the video is using a tablet designed to write on and be shown on a computer. it's not that hard for him to do this

so he is not a mouse master

[hammd123]

@neonorix he does not use mouse LOL. Its digital note book

[abarbar06]

Im retaking a placement test for college (i forgot my trigonometry from junior year) can you refer me to a website that has good problems that cover high school pre-calculus trig?

[Kniitte]

@abarbar06 patrickjmt

[NuclearReality]

you're a hero! :D

[specops3866]

This guy explained a lesson in about 7 minutes than my math teacher could in two weeks.

[piyushthesmart]

ur videos are extremely helpful..thank u very much sir....

[hampsters11]

What year maths is this?

[PikachuVongolaCK]

OH, I GET IT, NOW!

[ScorchinBeats]

Can you do a video about the beat function?

[IAmTheNamelessOne]

ah... yeah a bunch of people missed a test so he had us all do it in class instead of listening to the lecture so i missed it all. Because I found this and the previous video, I understand! :)

[MsAprillJ]

THANK YOU!!! All of your videos are SOOOO helpful :-) You are an awesome teacher!

[sara4542]

excellent teacher :)

[sabayak]

Now this makes seance....Thank you sooooo much....Ur the best Dr. Khan

[musicmakr]

Great video!

Makes this so much more clear!

[chainsinajar]

awesome vid my teacher just fails us all and then laughs because she doesnt teach us anything

[DanielKovach]

Can't wait to watch this video later!

[mrpopos]

U the best man

[mscooky19]

we love u khan....ur videos made us fall in love with calculus :P

[mscooky19]

and trignometry :)

[dazzled101]

so fucking confusing sadly:(

[d2513850]

To infinity ,I don't know sin(∞) is.

[sh1nan1gan]

this guy makes trig easy to follow, my teacher whenever we ask her a question says i don know and if we ask for a hint, she points at the calcuator or the door. great person, just not good at telling u anything. failed my trig regents but i think i get it with this and i hope to pass

[DanielKovach]

LOLOLOL @ YOUR TEACHER!

[maycruz31]

How can I down load this videos? can anyone help me. thanks

[zeetee6]

download the latest real player and google chrome browser

[II123III]

he's the teacher i've been looking for!!

Thx man

[Bloodsaberxy]

Khan, you are my inspiration to become an electrical engineer, tnanks so much for these videos

[XsmashX1]

Thanks. You're funny too.

[wemoocs]

Jay-z + YouTube = BUNS

[wemoocs]

Super buns!!!!!

[wemoocs]

Ultra buns!

[Winsunn307]

Thank you, you are the Trig King

[MrVPD]

Tring King!!! I agree :)

[eNathan314]

He's also the Eco King. :)

[translucency]

thanks so much, this is really easy to understand and it is very helpful.

[FTislandgirl33]

does the unit circle always equal to 1????

[NKindianhobo]

@FTislandgirl33 Yes, always.

[majorkeybaree]

thats great,

my lecturer just showed me the graph one day and assumed i knew what it was

noe i KINDA get it, well im a little closer to getting it

[kramitdfrog1]

I'm sure you already know this, oh fantastic Khan who is awesome, but in paint the best way to get a level grid line is to hold down shift while you drag the line out. This locks the angle to multiples of 90 degrees.

Thankyou for the videos by the way, I've watched a few and I'm learning so much. This and project euler have helped my education along in leaps and bounds. (A real opportunity, since I never finished high school and don't have the money for uni)

[USFduNce]

I saw this video..and i jizzed in my pants. Thanks broski

[abdelmuhsen]

gr8 job

[the0dds]

how can i possibly have fun with math? hahaha.. but i think i'm gonna try it. . . it sounds.. uh.. fun. :D

[jokumusic]

Great video. I would have been nice if you showed that cos is 1 when sin is 0 and vice versa. That would have helped setup for your graphs of trig functions video and the relationships would have been a little clearer. Keep putting up these awesome vids!! :)

[djeroid2000]

Omg you seriously should be a teacher for like a precal/trig class! In fact you'd probably teach an honors course well too. You make things more clear than my teacher does!! Thank you sooooo much! Before all this radian and trig stuff was hard for me but you made things easier! Thanks again man!

[ManTiddies42]

im guessing he teaches college. not sure tho.

[khanacademy]

Actually I work in finance and I used to be an engineer. Find teaching more fun though :)

[balletkido]

THANK YOU SOOOOOOOO MUCH!!!!!!

ahhhhh

one question though...why did u use pi?

[rabidvermin]

when you see pi, that means it is in radian measure instead of degrees. 180 degress = pi, 360 degress = 2 pi. Look at his video on the unit circle definition and you will see all the different radian/degree measures. If you need even more detail, look at the video on radians and degrees.

[balletkido]

OOOO i get it now!

thanks you helped me w/ my hw!

[MajDigi]

@khanacademy Dude seriously, get paid.

[NKindianhobo]

@khanacademy As an engineer, what did you do on a day to day basis? Did you have to apply this sort of math in your daily work, or was it more of problem solving kind of stuff? I feel like the field of engineering places such an emphasis on mathematics, yet I've heard and read that math isn't really applied that much in actual work... what is it then that engineers do at work?

[oglow100]

@khanacademy You sir are one amazing person and deserve a nobel prize. You have allowed me to do soooo much better at school and i am ranked among the best in my year level all thanks to you. If all teachers were like you then there would never be any drop outs i wish you all the best and again i thank you so much!!!

[RavellaMusic]

@khanacademy And we're all glad as hell that you do. I absolutely hated mathematics at school, and now that I have an interest you're around to calmly and carefully explain things.

[IcarusFlying]

@djeroid2000 check out his website khanacademy i think what he's doing here is more important than becoming a teacher in the traditional way.

[KeyLuCreations]

hello! u are a saint! i love ur videos!i am trying to graph the cos function and i dont understand why when u graphed the sine function, u labeled the y axis as pi, pi/2, 3pi/2 and 2pi? i get that they equal 90, 180, 270, and 360 degrees respectively but i thought when one was graphing, we used numbers to represent the units on the axis, not degrees and radians?

[KeyLuCreations]

ok i looked at ur other video graphing trig functions and i get it.  when y equals pi/2, it really means 1.57. i get it now. i was so used to the units equaling whole numbers...(embarassed smiley)!

[gregtheapostle]

thanks for your time and effort; please keep it going!

[Elhammm]

I LOVE YOUUUUUUU!!! OMG I LOVE YOU MAN! seriously i was skipping classes cuz i hated feeling so dumb and after watching this BY ACCIDENT might i add... i am sooo going to class and i have a test tomorrow so im soo going in to do it I LOVE YOU! YOU ROCK!

[kerpal2343]

Totally, your videos are AWESOME!

[e8becket]

What can I say, I wish you were my teacher.... I still struggle on the secants though, do you think you can make a video of how that works?

[ink942]

!!!!!!!!!! YOUR THE BEST!!

rock on dude!

you have helped me sooo much =D

i love your vids!

plz make more

[2Luke]

this video is the sh*t!!! exactly wat i've been looking for. Thanks Very very much for explaining. you better than my teacher... im gonna get a paper and graph the cos and tan now. (added to favs)