RhinoLord
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What the Pythagorean Theorem is really trying to show you
Solving Pascal triangles
If you’re studying trig, you better get pretty comfortable with circles.
Here’s how you solve logarithms
Converting a function from Cartesian to Polar coordinates
Ellipse
Use FOIL to easily multiply binomials
Exterior angles of polygons will ALWAYS add up to 360 degrees
If an arc of a circle is the same length as its radius, the resulting angle is one radian
Use this trick so you don’t get mixed up when doing matrix transpositions
Tangent lines
misterskeItaI
I regret not being interested in math in highschool.
cachichiwis
Mad math Meth
TheFishFace
The "trick" for transposing a matrix is just... how you transpose a matrix? What?
SomeAngelDude
andrewkane
That's not "solving" Pascal's triangle, that's creating it. The rest are definitions and things you learn in a basic trig course.
CountryStuffDoesAThing
MATHS? MUST TERMINATE HERETIC!
tamalesandtea
Sin(0) is 0 and cos(0) is 1. It's been over 10 years and I still remember it because my teacher was a hard ass.
FarNorthFarLeft
You lost me at "Make"
TheLimpinBiscuit
@OP Use descriptions. They are your friend. Your third image's title got cut off.
WalterMatthau
#1 am I crazy, and/or does B squared not look all that square?
jsd3306
I think the lighting is poor, making the shadows distort perspective.
Nespadh
But what do I rea...?
redbullvodka
lly really want?
lawrus
That ellipse thing isn't helpful at all. It doesn't tell you anything. Those lines vary in length.
DavidPemberton
It's one piece of string. You push your pen into the string to keep it taught then move around to draw an ellipse.
o0ha0o
Effective•_._•
wittyusernamefourhundredandseventyeight
Can someone explain the logarithm one? As far as I can tell they're arbitrarily putting up six fingers
holdmyfingerandpullmybeer
ditto
badaBazinga
Is it just me or some of these are actually complicating the matter? These are simple maths
Squossifrage
How does Pascal's triangle need solving?
FsImgur
It's like Rubik's Cube.
PMMeYourPancakes
Holy shit like 90% of this is relevant or would have been relevant last year
bufferkiller
TIL my boner is mathematical!
HD226868
That sin-cosine explainer would be a LOT easier for people to follow in 2 dimensions. Just saying.
DidItForScience
I don't even get what it's trying to show and I've got trig fresh in my brain.
quantumpacket
But do you got parametrics?
ThisUsernameIsNoLongerAvailableIsStillNotEvenAvailable
It's trying to show the same thing as the other sin/cos gif. It's just showing the relationship between circles and sin/cos functions.
SenOfFiveTails
Most trig classes never really goes into functions of more than one variable , which that animation is. I didn't see functions like that..
Ramroddd
Its crazy important in 3D when you work with complex numbers
SenOfFiveTails
Until multivariable calculus. The helix there can be described parametrically by the equations x=rcos(theta), y=rsin(theta), and z=b(theta)
Mrdrewbeats
Useful when solving triple integrals, useless otherwise
pookieeatworld
That helps... /s
FelixTheMercenary
Can someone explain to me how the logarithm one works? What's he doing with his hands that gives the answer??
DavidPemberton
log_2(64) is a short hand way of saying "How many times do I need multiply 2 by itself to get 64?" 2^6 = 64 so log_2(64) = 6
jennsaysrawr
Nope. Still makes no sense to me. :-/ I'm incredibly bad at math.
kingharpy
You're not alone. I used to be better at this kind of stuff. Maybe too much imgur.
DHReaver
These are gifs, not teachers. Each of these requires explanation or prior knowledge. You're not bad at math.
deltajesus
Tbf these are all pretty shit, without explanation they're mostly useless.
AmazinglyCoolNameHere
Some of these are useless,some are good,but you need to spend a bit of time figuring math out,it will often not be immediately obvious.
MasterXehanort
I actually remembered the FOIL before the gif played. I feel good for some reason
grammamoses88
False. Did not make mathings "more easy"
TrigenderSwissArmyKnife
but can you tell me why the fuck john wants 30 apples and 20 oranges?
fayseman
I think these are all not actually helpful for making things easier to understand... except for the Pythagorean one, that one is creative.
DHReaver
A lot of people probably never think about how sin and cos relate to circles ( i.e. "sin and cos are those triangle things right?")
AmazinglyCoolNameHere
I actually thought that one was the most useless. #8 is, however, invaluable, it explains all the signs and values of trig.
fayseman
Whatever floats ur boat. I like to draw a triangle in a centralized unit circle, to me that's intuitive. Pythagorean one gives insight
JasonD
she is just so satisfied with herself for a split second at the end
Suchusernamemuchwow
He is just counting on his hands the answer to the log. I was looking forever to figure out the shortcut.
IPutAHexOnYou4c6f7665206d65
can you explain it? didn't get it
FriendlyNeighbour
So the question was log base 2 of 64 is equal to ?. This is the exact same thing as asking what power of 2 will give you 64.
itiscalledsource
Wouldn't that be 8 though and not 6?
fayseman
No, 2x2x2 is 8 and 8^2 is 64. To me that's the short cut
jsd3306
That's the definition of radian, not some amazing coincidence. A radian is the angle that cuts an arc the size of the radius.
JosephSelah
I was thinking the same thing. "The trick is just showing me the actual definition of a radian???"
LittleMathCat
I don't think it is generally taught or explained as such.
henrycavill1234
I just don't understand why it is too hard for students to grasp.
WillTheFifth
Fairly certain the third image is an visual aid to understand the polarization of light, X and Y are electromagnetic wave propogating at (1/
Orkimondi
Thought that too.
WillTheFifth
2) right angles, with the spinny spiral bit being the polarized wavefront propagating along axis z.
quantumpacket
Yep, that works. It's also the z-axis-is-time representation of the normal 2D sin-cos graph like that. More helpful as a visualization (cont
quantumpacket
(2) for parametrics in multivar calc
FsImgur
Wrong. It's how to make the spring they put in those pens.
vroomvroomsplat
Favorited because I'm 30 and my oldest is 12. I don't understand his math homework already. Because I'm a fucking troglodyte.
Mewmus
Osama?
Webelos8
I'm a decade and a half older than you, and my daughter's the same age. We're both shitty with math but at least she gets tutoring
nihilistdad
Troglodytes are the future, if you had your first child at 18...
classybroad
This is my greatest fucking fear. My kid is 3. Our school district went common core a couple years go. I'm so boned on this.
kusanagiseed
Up Voted for for being a cave dwelling humanoid!
PackedCatMeowingPowerDensity
TROGGS RULE!
coldbloodedpomodoro
If you understand that you are a troglodyte then you're not.
TitaTitanium
MotherImgur
Hey, I'm 16. If you ever need help with something (or rather, your son does) I'd be more than happy to help.
UndeniableRealities
Theres more than one 16 year old on this site? Theres dozens of us!
Eskimo347
Get on Kahnacademy.com free lessons will videos where they work through the problems and can test your understanding. Many subjects covered.
qualcosa
.
AdamTheAmateur
THIS! *Khanacademy, and the exercises are really where it's at. The videos are useful, too, but guided practice will help the most.
RichieYesitsSpelledRichieNotRitchieNotRichey
Khan academy is fucking garbage tbh the videos, at least for geometry are garbage. The exercises are only good if you've been taught first 1
RichieYesitsSpelledRichieNotRitchieNotRichey
We've been using it for "individualized learning" and usually have to start without teaching, and then the teacher wonders why we're failing
AdamTheAmateur
Math in general can feel really shitty when you're struggling. It sucks that your teacher isn't supporting you. Don't give up!
ChaDDyF
You will no longer be able to help him after algebra, trust me I'm a calculus student, but A for effort!
ZeRoyalViking
it's just a matter of pruning. people that don't use this information regularly forget it, and that's okay.
dav3nasty
I know, the school systems is terrible. Common core is hard and makes me feel stupid so it must be stupid.
GreenTea988
You fucking polynigmion.
al640814
sounds like an extinct prehistoric species lol
al640814
OH IT IS. nvm
Demauscian
Troglodyte is anyone that lives in a cave.
Redandpurpleunicorns
misread as TRIGlodyte.
KapnKershaw
I prefer Mathlete
TinyLiehon
And kids wonder when they'll ever need math.
darnyoulikeasock
I successfully cheated my way through HS math so my kids are getting no help past 9th grade.
everythingsucksandwereallalone
My younger brothers (6th) are learning about matrices....
xenocyde1224
Damn, that's awesome! American public schooling?
everythingsucksandwereallalone
American Private, but still!
xenocyde1224
Nice. The private schooling has always been leagues ahead of public sadly. I remember the undergraduate days, they were well prepared
everythingsucksandwereallalone
Yeah.... It kinda sucks....
gen1er
I just got mine from Ikea. I wish I knew more about them before I bought one.
ditarantula
I remember learning what matrices were when I was young, and how to add them, not much else though. I hated linear algebra last semester.
eraser1
I loved linear algebra. Makes solving systems of equations soooooooooooo easy :D
everythingsucksandwereallalone
Yeah, but they are learning computer graphics based of of them and shit
everythingsucksandwereallalone
****Off of them
ditarantula
Yeah, looking at older games is like looking at a huge matrix
everythingsucksandwereallalone
Yeah it's almost weird with today's graphics
merdryn
Never thought you'd say "back in my day" at 30, did you? DID YOU? Trust me, you'll say all the things your parents did.
Therearetoomanyusernames
*SOB* I make their facial expressions that I hated so much too!!!!
vroomvroomsplat
Well I'm a 30 year old father of a 12 year old. I hope he chooses a different path ;)
t4thfavor
Well if you're helping him with math homework you can't be doing that badly as a father.
molestmymonkey
Some people realize that stupid choices are stupid. Others teach their children to make those same stupid choices. Seen it far too often.