Trig: Unit circle Trick

[ZPebble21]

MAME, I THINK I LOVE YOU. I HAVE A QUIZ TOMORW ND I WAS FREAKING I SAW THIS AND IT HELPED ME TONES, OTHERS WERE LIKE VIDS OF TOO INTELECTUAL TRYING TO TEACH NEWBIES HOW TO LEARN... U HELPED ME SO MUCH. THANK YOU, THANKYOU SO MUCH!!! KEEP DOING WAT UR DOING I <3 U!

[verveer1]

its actually easier if you use the back of your hand, that way cos is on the left side (x value) and sin is on the right side (y value) and that way the 90, 60, 45, 30 and 0 degrees fall in the order they should

[barkingtriscuits]

This 'trick' makes it so confusing, for me at least.

Anyone else who is searching for help on memorizing it, check out patrickJMT. His videos have helped me so much! He explains things so much simpler and more logically.

[icxcrex]

Fellow teachers (especially the college teacher who commented upon the sad state of affairs), the children in today's pool are not equipped because they are not taught how to think, they are taught what to do; and everything is done for them. This is a generalisation, and I think it's pretty close to the norm. I fail to see the difference whether one uses his hand (kinesthetic) or draws the special triangles (visual). Be less dogmatic, and learn more about teaching students to learn and THINK!

[webbabbi]

this is awesoooomeeee ! thank you so much :))

[mmrafi2010]

Hello Ma`am, I am not sure what's wrong with the people!! I just wanted to thank you for sharing this AMAZING idea. Don't take these stupid comments of these _______ people into your heart. Ignore the comments. I tutor math and I know how it feels. Thank you again...Thank you very much.

[MaddiesMusicPlaylist]

a lot of people don't realize that learning math ISN'T just about learning math and how to calculate numbers, there is a reason its called "problem solving". math teaches a person how to think around obstacles in life. i think that is something every person needs too keep in mind. it is very helpful to try hard in math related subjects. (: i wouldn't advise anyone to give up on math. this video is helpful, but it may be damaging to the greater good of the students. :/

[DRCRAZY03]

lmfaoo wtf.. this goes against what i learned.... All Students Take Calc. on the second quadrant sine is always positive not negative -_-

[FBAMath]

@DRCRAZY03 - read the text under the video, it corrects the second quad mistake, sorry

[flowiepanda]

@DRCRAZY03 why would sine be negative in the second quadrant? sine corresponds to the y axis and in second quadrant it's positive

[jjsteckro]

This entire discussion is a perfect illustration of why our country is in such sad shape mathematically. From teachers who don't care whether students understand to students who care only about a meaningless trick to get them through the test, this is a sad commentary on the state of mathematics education in our schools today. Until students make sense of what they are learning, there is no hope. I teach college math and see every day what this approach has done to our students. Very sad indeed.

[FBAMath]

@jjsteckro try teaching high school Algebra II to every student in the school even those who are not ready for the class. Then talk to me about give the students tricks. By the way this is not an American trick. It came from an exchange student in a country that kicks out buts in math! It's not the teaching of tricks that is the problem.

[FBAMath]

@jjsteckro Hey, I have a great Idea. Could you email me with the things you as a college teacher would like the students to understant about the unit circle. Maybe I could use it to help or maybe I already teach it but here am just fulfilling a requirement of one of my college classes. What exactly do you want the students coming in to your first year math class to know? my email is lmcalvey@hotmail.com

[AldenFisher]

Holy shit! Mind=blown!!!

[AldenFisher]

Ho

[BillyNye1982]

Too bad that's not your left hand dummy... Left Hand Makes an L shape...

[FBAMath]

@BillyNye1982 Your left hand makes an L shape when you look at the back side. This is the front side. It is your left hand. Check it out :)

[TheAloha1991]

I wrote this on my hand for a test, and I got permanently expelled from school.

Lesson Learned

Don't be a dumb ass.

[FBAMath]

@TheAloha1991 write it on for your homework. After a while you will remember it without it written there. That is when it works for the test. There are no short cutes to learning.

[xelionizer]

what about a tattoo of the unit cirkle in the middle of the forehead??

[poyanator]

THIS IS GENIUS!

[kiotri]

@CallMeSmash no, the square root of 2 is not 1

[blablabii]

thank u so much!

[CallMeSmash]

is square root of 2 over 2 the same as 1 over square root of 2??

[FBAMath]

@CallMeSmash square root of 4 over 2 is one, square root of 2 over 2 is square root of 2 over 2. square root of 1 over 2 is one half.

[zoomnate]

Some teacher!! Signs are wrong in Quad 2. And she still doesn't notice!

[FBAMath]

@zoomnate it is written on the notes.  I did notice. That is why the note on the bottom. Thanks

[cabz4lyf]

AWESOME!!!!

[gango95]

THIS SAVES MY LIFE! THANK YOU

[nccavs]

wow i was really confused when someone explained this to me, thanks for a much better explanation

[flowiepanda]

This is ridiculous. Why memorize a lengthy "trick" when you could just sit down, make a set of flashcards, and learn the damn values? Once you go into higher math, you just HAVE to know this stuff without thinking about it. This should be like the multiplication table for you. Besides, as long as you're writing things on yourself, why not just draw the whole unit circle on your chest?? Or better yet, get a tattoo!

[davewalwark]

@flowiepanda if it helps people learn, then it accomplishes what you have requested.

[flowiepanda]

@davewalwark one can hardly call this learning

[FBAMath]

@flowiepanda why does it bother you that some people are better at learning with other techniques?  To each his own. You don't need this then that is great, don't cut on others for benifiting from a little help.

[jjsteckro]

This is absolutely hideous, that someone who claims to be a teacher, would stoop to the level of utilizing "tricks" to complete a "circle chart." Those of us in the profession refer to this as the Unit Circle, btw. For decades I have worked to eliminate meaningless tricks and shortcuts and replace them with understanding that is based upon meaningful relationships. The more I listened to this woman, the more I thought it must be a parody of bad teaching, because this is deplorable.

[FBAMath]

@jjsteckro excuse me but there a many people who don't understand your "words" when you help them "understand", understanding for some comes much later. The test comes sooner. Sometimes you have to let people learn on their own time but help them get through until the undrestaning is there. I would have to say that you are a bad teacher if you do not help your students with memory tricks when they are just beginning.

[orangemnmx8]

but i'm left handed :(

[xequant]

If you use your right hand, instead of your left, you get the results in the traditional x,y or cos,sin order. Also, moving from finger to finger in order to go from 30 degrees, to 45 degrees to 60 degrees, etc happens in a counter-clockwise direction, which is more analogous to the unit circle.

[FBAMath]

@xequant cool!

[FBAMath]

The only undefined trig answers are the ones for Tangent and this unit circle trick only gives sin and cos so really there are no undefined ratios. For tan answers you must divide sin by cos so the undefined tan functions are those where the cos is 0.

[FBAMath]

The only undefined trig answers are the ones for Tangent and this unit circle trick only gives sin and cos so really there are no undefined ratios

[MischievousRose]

what about the ones that are undefined?

[kaipochu]

isnt the second quadrant of sin should be +?

[AbbyMarie87]

I get bored even thinking about all this :I

[thisislifeable]

Amazing...Thank you sooooo much it was sooooo helpful. God bless u!!:):):):)

[03raq]

And how do I find for Cosecant ? :(

[sohoyankee66]

Good stuff. Thanks for posting. Small problem though, I'm left handed. :) I make it work though.

[Xenon068]

I can't believe i just signed in just to thank you for this video.

Anyway, thanks. It's my exam tommorow, wish me luck. :D

[supersueme]

this is awesome! thank you so much!

[shoutcastadmin]

Lol haha omg that makes it so easy :P

[MrPirate408]

i like this one its makes my life so much easier GOOD JOB TEACHER!!!!!!!!

[mdjm95]

thanks so much! This trick is really helpful to do the unit circle quickly on time tests.

[YEahsasdh]

On the second quadrant (+,-) supposed to be (-,+)

[chubz1435254]

@YEahsasdh yeaH

[jashey100571]

isn't it that the x and the y coordinates in the second quadrant are - and + respectively?

[itbeonlikedonkeykong]

@jashey100571 yeah your right.

[tatakbulakenyo]

@jashey100571

the signs, +,- refers to the signs of (cos,sin)

[seferinoambrosio1]

@tatakbulakenyo

Yes, there is a mistake when she refers to second quadrant and their signs. Change sings, keep the values and everything will be fine!

[heliumexplosion420]

Cool, I'm going to go into the testing center with this info on my left palm. LOL

[briansmobile1]

Great video- this is the kind of thing the world needs more of. ESPECIALLY in the U.S. My teachers in college spent all their time on trig exceptions etc. What a waste of time. This has valuable take aways that are very handy. (pun intended) A working knowledge like this gets the language in place and gives a student the tools and confidence to be comfortable in math. If you don't have that you will hate it and then you won't put your hours in.

[Missylisa517]

GOOD trick. love it

[khalidMe1]

woooh

than you.....

[aznsleepyb0ii]

wow this is pretty cool

thanks

[jarrett4322]

Loved the video...however in the second quadrant x values are negative and y values are positive. thanks.

[lus124]

oh hey there my favorite math teacher!

[FBAMath]

Thanks for noticing!