Redefining the Trig Functions on the Unit Circle (1 of 2: The Basic Concept)

Рет қаралды 264,017

Eddie Woo

9 жыл бұрын

Пікірлер: 105

@yasinozel4965 4 жыл бұрын

I wish I had teachers like you when I'm younger. My life would be different now.

@LingLing-yb9lb 3 жыл бұрын

it is never too late to learn, go to community college would be other options. Such as SBCC

@henriquepereira2811 Жыл бұрын

@@LingLing-yb9lb practicing 40 hours a day, of course you can learn everything

@graceseber9815 3 ай бұрын

Did u just edit this😭

@ull893 4 жыл бұрын

My math teachers were always grumpy. They were like, i have to do this because i need to get paid. You are like, i get paid anyway, so why not teach with great enthusiasm. Love it. God bless you. 😊❤️❤️❤️❤️ You have no idea, how much you are helping students. I am sure, kids are coming back to your videos, in order to understand what they were supposedly " taught " in schools.

@arwashatla1552 Жыл бұрын

Yup, exactly, thats what lm doing right now

@brunoclixe5225 Жыл бұрын

Just (probably) failed my math exam, so now I'm revising for next year. This is one of the exact questions i got wrong...

@charlieng3347 4 жыл бұрын

The more I learn about math, the more I think that we are very illiterate. Cause math is a language, being good at math is more about understanding meanings than about computing power.

@Louis_2568 Жыл бұрын

EXACTLY not everyone has photographic memory and a super computer brain to just memorise equations my brain doesn’t learn anything unless I fully understand the how and why which is also why my friends think I’m super weird because I ask the most unusual questions to them even though I need to ask it to fully wrap my head around everything or it doesn’t lock into my knowledge

@adityashaw6101 Жыл бұрын

@@Louis_2568 Rightly said!

@user-pf4tg7it4c 10 ай бұрын

No just look at you Fingers at aks yourself why we count in Dezimalsystem 😂sorry for the german Word

@mj47_dreamer 9 ай бұрын

This kind of exchange of views is what the comment section is meant for 🙌💯

@aoifemurphy8002 3 жыл бұрын

I simp for this man

@69420braincells 8 ай бұрын

😭😭😭

@foxynie.5861 3 ай бұрын

Real

@foxynie.5861 3 ай бұрын

Real

@evanharriman4913 2 жыл бұрын

Love your teaching style!! I'm 35, working as a CAD drafter and trying to fill in the gaps of my education. Thank you for all the work you do in breaking this down for your class and all of us on the internet : )

@zorxey3189 Жыл бұрын

If anyone ever reads this comment, take a moment to appreciate how perfectly he drew the circle on the board lol

@kummer45 3 ай бұрын

This is an example of someone with a high degree of professionalism.

@IArkProject 7 ай бұрын

I'm a 35 year old going back to school to study Data Analytics and Business Analytics, and the curriculum very strangely throws us into Calculus when the majority of students haven't even done precalculus... Suffice to say I am completely lost in the precourse material. This explained in less than an hour what I missed from years of just memorizing trig from teachers who didn't really understand it themselves. Truly amazing stuff, I hope this man is still teaching.

@saadjaved2000 6 жыл бұрын

1:53 "YES"

@georginam9899 2 жыл бұрын

Your vids are the only things getting me through online school rn, thanks so much Eddie I wouldn’t be passing maths without u 😭🙏

@kenlamb5697 4 жыл бұрын

Love the enthusiasm. Makes it easy to listen to.

@lilianagordon6962 5 жыл бұрын

Pure genius! Thank you so much! It's all starting to make sense now.

@jakekim6313 2 жыл бұрын

THANK YOU SO MUCH FOR BEING THE FIRST PERSON TO TRULY HELP ME UNDERSTAND. OMG THANK YOU

@methira 2 жыл бұрын

This was recorded on my birthday 😂

@surhit 3 жыл бұрын

Mathematics is the purest language of Universe, and its always same even at another galaxy, another planet, with another living creature.

@AnnuPriya-jm2fr 15 күн бұрын

Loved the way you explain. This is the first lecture I watched on KZfaq on trigonometry And this 10min worth much more than 1 hr in class. With( nonsense teacher 🤮).

@nickjtomasello 3 жыл бұрын

Just shared these videos with my students, I hope they like them! Katie, Serafina, Aadhi, if you're watching this: hi

@abbosyakubov3923 4 жыл бұрын

It helps me to review what I learned before! Thx!

@subhamshreyashutosh5645 4 жыл бұрын

You are just the best maths teacher I would love to have for .... thanks a lot .....

@juanitaalyozha848 5 жыл бұрын

Enlightening! >> The Enlightenment has come to Australian mathematics > Thank you Eddie < from Zizi

@AlessandroZir Жыл бұрын

omg! how can people not just love you?!! ❤❤

@lovetownbomber 9 ай бұрын

Mind=Explosion. Thank you Eddie

@williamnavarretemoreno 4 жыл бұрын

Awesome teacher

@aprilla9112 4 жыл бұрын

yasss thanks dude ahhh . i needed this so much rn

@mrwmc22 3 жыл бұрын

Yoda 4:37 haha, thanks for another great video Eddie. Helping out a ton

@Shubham-kb2bg 4 жыл бұрын

This was the video I was searching for

@ratnam7728 4 жыл бұрын

You blew my mind🙏

@bruce33331 2 жыл бұрын

you do gods work ..... thank you

@deborahd3689 5 жыл бұрын

this explanation is unreal

@16BelieverForever 4 жыл бұрын

Deborah D Best one I’ve come across so far! Love it!

@Halderchess Жыл бұрын

Thanks for the lecture.

@JohnDoe-rx3vn 3 жыл бұрын

You sound like Dave from EEVBlog, and it's comforting

@Vitross 4 жыл бұрын

Bearings is not arbitrary we start at north because of the compas magnetic attraction to the north pole.

@jesusthroughmary 4 жыл бұрын

Bearings start with north because that is a magnetic fixed point.

@ck0024 6 жыл бұрын

I feel sorry for my poor school teachers.

@Petecavemaster 6 жыл бұрын

ikr

@livethefuture2492 4 жыл бұрын

They dont deserve such a gesture.

@qwertyki9367 3 жыл бұрын

@@livethefuture2492 some teachers are fine but the students are a bunch of obnoxious brats

@ahmedmohamed-ge2nq 5 жыл бұрын

nice work

@darcy6698 Жыл бұрын

¡ thanks a pile, friend !

@AchtungBaby77 3 жыл бұрын

The mnemonic I learnt when I was doing trigonometry was: Stamp On His Corn And Hack The Other Ankle! 🤗👍

@redinc.9353 6 жыл бұрын

how did you drew a perfect circle and a perfect triangle without scale ?

@Pwnzistor 4 жыл бұрын

Asian

@AnnuPriya-jm2fr 15 күн бұрын

@@Pwnzistor dude 🗿💀

@ClearOutSamskaras 11 ай бұрын

"Which trig ratio should I choose that can RELATE those two sides?" 7:01

@reubenmanzo2054 2 жыл бұрын

8:45 And with that, we've taken a step into parametrics.

@ahmedhamza3939 2 жыл бұрын

ok my question is very very dumb but i ant to answer it what if it wasn't a unit circle ? by other mean why unit circle ?

@carultch Жыл бұрын

We use a unit circle to teach this, because of the KISS principle. "Keep it simple, silly" If it isn't a unit circle, then instead of x=cos(theta) and y=sin(theta), you end up with x=r*cos(theta) and y=r*sin(theta), where r is the radius of the circle. When it is a unit circle, r is defined to equal 1, so that multiplying by r is not necessary. Simple matter of scaling, if it is a circle in general instead of a unit circle. But making it a unit circle simplifies it, so we can focus on how x and y positions relate to theta in the simplest case.

@abdelmagedkhater2933 3 жыл бұрын

Good teachers

@DeJay7 2 жыл бұрын

1:51 "Can I do trig with this angle?" "Yes" _Completely ignored_

@avinashsparrow2911 2 жыл бұрын

Nice sir

@alannahdunstan3415 3 жыл бұрын

What year is this?

@user-rz7hf7ik1x Жыл бұрын

عاشت ايدك استاذ

@rashedshifat8091 6 ай бұрын

Helpful

@sayarsine6479 2 жыл бұрын

Thanks

@snowflowertea 5 жыл бұрын

a lot of *rights*

@squishedavocado4546 10 ай бұрын

eddie woo cool

@tabrezshamshashmi4043 6 жыл бұрын

Sir We took help of 90 degree triangle to understand the x and y coordinate value of a point on perimeter, For the first quadrant it is ok to understand this by drawing right angle triangle... But for angle greater than 90 it is difficult to visualize what is actually happening there... Like how a sin 90+ theta becomes cos theta. Please do make me visualize this transformation Thank you

@darkzonegaming9169 Жыл бұрын

yeah man same problem

@madxsla8409 Жыл бұрын

This is because they are complements of each other in fact cosine stands for complement of sine btw it was explained in an earlier lesson

@Reddit.StoryMan Жыл бұрын

When I saw that you are asian I knew you will help me

@keanejohari-io4dx Жыл бұрын

This is why I'm not going to fail my exams.

@brei.z Жыл бұрын

This is really helpful and he is a great teacher but there is a gap between the last video and this one.. So I missed the part about tan.. and then he refers back to it in this one so it's hard to carry on with parts missing.

@ezekielanderson9055 Жыл бұрын

This is the first of his videos that I did not understand. Guess that means I can't understand the unit circle nonsense 😭

@rickshawthe3nd112 4 жыл бұрын

Why was it published on 10th march 2015 if the lesson was on 25th feb 2015 Oh yeah hes a busy man

@thevikingwarrior Жыл бұрын

01:53 - Wow, you should try reading about spherical trigonometry.... Things really go to pots then!

@maruthimaruthi4588 3 жыл бұрын

I don't know about this before i watch this vedio because I don't have this concept in my trigonometry chapter

@cybrothers4033 3 жыл бұрын

How could i contact you

@GursimranSingh-ft8ig 4 жыл бұрын

Is 0° an acute angle?

@devikas.9088 3 жыл бұрын

Nope, it’s known as a zero angle

@thevikingwarrior Жыл бұрын

@kareemkeryakes1706 Жыл бұрын

I love u,

@matthewvicendese1896 5 жыл бұрын

The triangles work fine. You just have to flip them around the axis.

@tasmiyasana1257 2 жыл бұрын

I hated Math until I found him.

@mrk2938 5 жыл бұрын

SOH CAH TOA

@shashank_kishore_ 6 күн бұрын

❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

@mehrdadbasiri9968 2 жыл бұрын

Hi. Sorry i have a quastion in 10:00 You draw a dot on circle and name it (cos,sin)... But i think it's (-cos,sin) because the dot is in the minus part of (cos)(part 2). Am i right???

@dariusw8899 2 жыл бұрын

it's still (cos, sin), but the cos theta for that dot is a negative number. the same way that the x coordinate is a negative number, but it's not a negative variable.

@mehrdadbasiri9968 2 жыл бұрын

@@dariusw8899 you mean that generally it is (cos,sin). But because it's in part 2 the cos is negetive. ???

@dariusw8899 2 жыл бұрын

@@mehrdadbasiri9968 yes. cos and sin are functions. so generally no matter where you are on the unit circle, the x and y coordinates are defined by cos and sin of the angle. they do not have a sign because they have been evaluated yet. then when they are evaluated, like in part 2, the cosine of theta is a negative number. in other words, the OUTCOME of cos theta is a negative number, but the x coordinate is not (-cos).

@mehrdadbasiri9968 2 жыл бұрын

@@dariusw8899 Ahha. I see then. Thanks for your help.🙏🙏🙏.

@rashedaakter3588 2 жыл бұрын

What is bearings??

@carultch Жыл бұрын

In this context, it refers to a compass direction that is measured clockwise from north as a convention, such that north is 0 degrees, east is 90 degrees, south is 180 degrees, and west is 270 degrees.

@indeedinit 4 жыл бұрын

are anyone else's teachers too lazy to create a video of a lesson, in remote learning, and just giving us edie woo videos?

@hayley9623 3 жыл бұрын

no 😭 they made their own and they were so shitty if they gave us eddies i probably could’ve done better

@YouMeverse 10 ай бұрын

sorry but his accent irritating me alot

@Therradican 4 жыл бұрын

Constructive criticism... Your subject is very important. But you need to write and speak clearly. Your writing is very small and cannot be read. Your speaking style is very annoying because you do not speak clearly.

@R3_Live 4 жыл бұрын

I found it perfectly clear and legible...

@lIlllIlllIlIlIllII 4 жыл бұрын

bruh what u saying? its a yt video and his writing is perfectly fine?? also how is his 'speaking style' annoying? he speaks perfectly clearly

@bingbong-yn6yg 3 жыл бұрын

idiot

@Therradican 3 жыл бұрын

@@bingbong-yn6yg Get thee behind me Satan.

@bingbong-yn6yg 3 жыл бұрын

@@Therradican no wonder u couldn’t understand the video English clearly isn’t ur first language don’t blame others for ur shortcomings idiot