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

[@yasinozel4965]

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

[@LingLing-yb9lb]

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

[@henriquepereira2811]

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

[@graceseber9815]

Did u just edit this😭

[@ull893]

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]

Yup, exactly, thats what lm doing right now

[@brunoclixe5225]

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

[@evanharriman4913]

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 : )

[@aoifemurphy8002]

I simp for this man

[@THEREALPAPAO]

😭😭😭

[@foxynie.5861]

Real

[@foxynie.5861]

Real

[@abi-9000]

Real

[@charlieng3347]

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]

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]

@@Louis_2568 Rightly said!

[@420islegend]

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

[@mj47_dreamer]

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

[@ThePreparedMuslim]

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.

[@kenlamb5697]

Love the enthusiasm. Makes it easy to listen to.

[@lilianagordon6962]

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

[@JLKeener77]

Thank you for your wonderful teaching, Eddie. So many more people would love mathematics if they would have had an instructor like you. :-)

[@jakekim6313]

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

[@AnnuPriya-jm2fr]

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

[@georginam9899]

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

[@saadjaved2000]

1:53 "YES"

[@lzl7264]

I can’t envy your students even moreee. Whether your students enjoy or are good at math really depends on the teacher

[@kummer45]

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

[@DanielFlores-gx7xi]

I've learned more about math from this video than all my my senior year. Great explanation vs what I got. "Here's how to do the math. Memorize it. Test is next week"

[@lovetownbomber]

Mind=Explosion. Thank you Eddie

[@surhit]

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

[@subhamshreyashutosh5645]

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

[@juanitaalyozha848]

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

[@abbosyakubov3923]

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

[@AlessandroZir]

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

[@nickjtomasello]

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

[@Shubham-kb2bg]

This was the video I was searching for

[@deborahd3689]

this explanation is unreal

[@16BelieverForever]

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

[@methira]

This was recorded on my birthday 😂

[@mrwmc22]

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

[@williamnavarretemoreno]

Awesome teacher

[@redinc.9353]

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

[@Pwnzistor]

Asian

[@AnnuPriya-jm2fr]

​@@Pwnzistor dude 🗿💀

[@ck0024]

I feel sorry for my poor school teachers.

[@Petecavemaster]

ikr

[@livethefuture2492]

They dont deserve such a gesture.

[@qwertyki9367]

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

[@JohnDoe-rx3vn]

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

[@Vitross]

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

[@bruce33331]

you do gods work ..... thank you

[@rashidbestry]

You are amazing... 😊 thank you

[@jesusthroughmary]

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

[@ratnam7728]

You blew my mind🙏

[@AchtungBaby77]

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

[@vedantmahajan4185]

On the day of Christmas 🎁 I want him as my school teacher 😅

[@Halderchess]

Thanks for the lecture.

[@ClearOutSamskaras]

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

[@aprilla9112]

yasss thanks dude ahhh . i needed this so much rn

[@reubenmanzo2054]

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

[@ahmedhamza3939]

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]

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.

[@DeJay7]

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

[@darcy6698]

¡ thanks a pile, friend !

[@Cheryl-cs6gj]

Does it have to be a unit circle because it’d make the radius/hypotenuse 1?

[@emayteetee73]

It’s called the unit circle because the radius/hypotenuse IS 1. You could define it as any length but all calculations performed could then be reduced to the equivalent radius or hypotenuse of 1.

[@mehrdadbasiri9968]

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]

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]

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

[@dariusw8899]

@@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]

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

[@keanejohari-io4dx]

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

[@tabrezshamshashmi4043]

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]

yeah man same problem

[@madxsla8409]

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

[@alannahdunstan3415]

What year is this?

[@rickshawthe3nd112]

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

[@ezekielanderson9055]

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

[@thevikingwarrior]

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

[@GursimranSingh-ft8ig]

Is 0° an acute angle?

[@devikas.9088]

Nope, it’s known as a zero angle

[@thevikingwarrior]

No

[@brei.z]

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.

[@tasmiyasana1257]

I hated Math until I found him.

[@ahmedmohamed-ge2nq]

nice work

[@abdelmagedkhater2933]

Good teachers

[@cybrothers4033]

How could i contact you

[@rashedaakter3588]

What is bearings??

[@carultch]

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.

[@maruthimaruthi4588]

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

[@avinashsparrow2911]

Nice sir

[@Hhhhhhhghh]

عاشت ايدك استاذ

[@matthewvicendese1896]

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

[@rashedshifat8091]

Helpful

[@ramstudypoint7252]

Nice

[@snowflowertea]

a lot of *rights*

[@sayarsine6479]

Thanks

[@mrk2938]

SOH CAH TOA

[@shashank_kishore_]

❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤

[@squishedavocado4546]

eddie woo cool

[@kareemkeryakes1706]

I love u,

[@Reddit.StoryMan]

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

[@indeedinit]

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]

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

[@YouMeverse]

sorry but his accent irritating me alot

[@Therradican]

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_dacted0]

I found it perfectly clear and legible...

[@lIlllIlllIlIlIllII]

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]

idiot

[@Therradican]

@@bingbong-yn6yg Get thee behind me Satan.

[@bingbong-yn6yg]

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

[@nancyel-hadi2103]

nice work