Trigonometry: Complex Numbers

[scratchfacemoh]

wauw ...huge thx

[0854668701]

ชอบๆ

[chadwick0091]

how is this trig? isn't this algebra?

[12potok]

thanks for clear explanation

[flumbulle]

easier to just say if you can divide the exponent of i with 4 the answer will be 1 and if there are leftover exponents, let's call em a, just do 1 x i^a which should be quite easy considering a can only be 1-3 unless it's negative number I suppose.

[bradneyjoebruno]

Wy it's not 9 -1 instead of 9+1? because i times -i should be -i square. which i think is -1

[cheer4mwah]

@bradneyjoebruno It is right. Because 9 MINUS -1 is actually 9 PLUS 1 which equals 10. :)

[ChristmasInMay011]

this is geek

[TheConstipatedcamel]

Awesome!

[Avinator100]

you should get a noble prize fore your handwriting !!!!!

[IamXtreme]

this is basic math

[boytuhab]

@IamXtreme basic math my ass, I need this one

[ravingjunkey]

Anyone want to help me with maths, easy stuff (Which is extremely hard to me) like SOH CAH TOA. lol???

[drfoxcourt]

@ravingjunkey It's a little tough to do teach SOHCAHTOA and other trig via youtude commentaries. Watch some related videos and grab a textbook from your local library.

I'll be happy to try to teach you via email if you like. Send me a response and we can pass email attachments.

[toshirobirthday]

Thank you. Under Trigonometry: Complex Numbers; Would you create a lesson re: de Moivre's Theorem? Thank you. I am big fun of your teaching!

[schererman]

why am i watching this...... >.>

[JoeBird76]

....why am i watching this? i dont have homework. heck..i dropped my math class. ..........hmm...

[orionvii271]

is any of this used in real life?!?!?! why are we learning this!!!

[RapsacDK]

In physics it's used for calculating a lot of different stuff.. for example you can calculate at which frequency there will be resonance in an electric orbit - and a lot of other stuff.. could be used to filter frequencies in radio signals and filtering bass in a sound amplifier..

[wzupy]

they don`t teach us that in school :))

[gr0mithtimon]

Yes! A lot! Don't be fooled by the name!

[vandomVenom]

WHY is the 4i square = 4(-1)?

[czaezaar]

cos i square 2 is -1 :) We are learning this at the university , first semester, and it's damned difficult sometimes

[DeluxeWarPlaya]

the idea behind complex numbers was to be able to solve for x in the quadratic formula where the answer under the sqrt sign is negative. This system of numbers was invented because you cannot take the sqrt of a negative number. The premise is that i sqred = -1, hence i = sqrt(-1).

[pokaymahn]

because the square or i is -1. and 4*-1 is.. well you know. wow wh y are you watching this you must be 4

[himsandwich]

because i^2 = -1

so there for 4i^2 is 4(-1)

[fancymoon2]

Could you please teach more about Data Management? I don't want to complain my teacher here. But you are really GOOD. Thanks so much

[mr0bear]

Too easy~

[Noold]

thanks you made this easy

[kebabsallad]

Complex numbers are idd easy, simple algebra imo. starting with em next year :)

[doesthismakesense123]

this man inspires me. When I am older, i will make math videos on youtube. you rock!!!

[bosseyedbill]

can you do some matricies, affinine transformations eg send a triangle to the origin and reflect it in the y axis.PLEASE with a cherry on top

[mortson978]

this is proof that my brain has run out of space. I used to know this stuff like the back of my hand. About a year ago i got into music theory, and now, i can barely recognise any of this stuff.

[Dynamics18]

too much to hold on to eh? i know i know. Learn one thing forget another, its like juggling with too many balls. O well, eventually I will only need to know a set number of stuff =).

[mortson978]

I learned to juggle too. That's probably how I lost the ability to factor Trinomials.

[RapidFireAlgorithm]

Homer Simpson's famous quote:

"every time I learn something new, it pushes some old stuff out of my brain".

[mortson978]

the human condition i guess.

[PanhandlePirate]

this is greek

[thaitanium2005]

5X + 2 = 4 5X = 4-2 X = 2/5

[Trajedya84]

ohhh yeahhhh!!

[jacobbis4lovers]

How did he get x = 2/5 for the first equation?

[thaitanium2005]

5X + 2 = 4

 5X = 4-2 X = 2/5

[sillypuppy2]

i see no trig here

[korrisha]

you are good what a teacher if you were my teacher I will get all A's

[Fuse1A]

Thanks, you are really good teacher, god bless you!

[korrisha]

wow you should have been my lecturer you make this look as easy as pie my lecturer just makes it hard I understand all you are saying wow thanks for the help

[Jonnymont]

you make this so simple!

my maths lecturer who makes it sound like rocket science; there are infinite infinitesimal gaps in the real line blah blah blah

thankyou!

[whenultra]

infinite finites

[Wuzzi55]

THIS IS GRADE 11 JUST SO U GUYS KNOW!!!

look at his smile xD this dude is awesome!

[ipponsuki]

What is your point, are you writing this just to show off?

[fenixreborn]

absolute value too. Dont forget to square the x and y of z to the half power, hah.

[tonygian10003]

if only i has the internet 20 years ago at school...

[ohmannhey]

YES!!!!

[lockdown5]

im currently studyn A level maths.. this helpd alot lol thnx :P

[willpower89]

thanks :D

[juuliuuz]

i dont know maths at all ;( i mean algebra and all these thins,so it does it mean that i am stupid?

[haistapaska20]

No it doesn't mean. It means you can learn them by excercising simple examples first.

[peracutus]

thank you sir! : )

[stevieola33]

no. math is easy, computer sciene is unbelievably hard

[willpower89]

nah they can both be hard...

but maths is interesting :P

[drakasx]

You pwn! :)

[jason4130]

math is sweet, nothing can expand your thinking like math

[lilcutiebooboo]

thanks a lot this tutorial help me out a lot i really appreciate it thanks

[g2game]

i am taking further maths and ist a little bit hard, but some units are easy

[dbest69er]

i get imaginary numbers but the serve absolutely no purpose in real life this is the only thing I dont understand

[eerickso]

shouldnt he say that x and y are real numbers? before starting the problem?

[rwcabrera]

Im in geometry and i dont know the function or uses of purely imaginary numbers but I somewhat understood it =)

[sebastiamer]

very good video I love the way you teach math, I'm currently studying these type of problems.