Trigonometry review
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- Опубликовано: 30 июл 2016
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A quick review of some ideas from trigonometry that will help us with AC analysis. The definitions of sine, cosine, and tangent, circles, degrees, radians.
when u have a trig test tmr and u had to learn a whole subject real quick before bed, he is the soldier we all needed
update: i got a 25% oops
Im about to follow in your footsteps
@@olimon3790 start studying from now on
start studying from now on
@@JoeMama-ub9zn i passed lmao. But yeah, this year im actually studying for quizzes and so far its going great
@@olimon3790 good job
I took trigonometry about 9 months ago, and now that I'm in Calc II, the importance of tangent being a slope was kind of a cool moment of something you already knew taking on new meaning.
When you have calculus and haven't taken a math in a year 🙃
Lol good luck with that
Me too buddy
Try 15 years
I have calc in my Engineering class and I haven't had any type of math for more than 2 years💀
going back to school after dropping out 5 years ago... so I haven't done calc in 5 years lol
Cramming for finals like
and here i am just here for fun
@@4amcuriosity162 what on earth are you smoking
SOH CAH TOA is important don't forget that statement
That very thing saved me during my exams
That’s beginner trig
Syr Cxr Tyx > Soh Cah Toa
Where's sal?!?
Thanks for the simple and straightforward explanation!
This really helps.
good lecture on math
Thank you sir
We can’t use calculators with on-ramps I need helpp
I remember SOH CAH TOA ! Great stuff! 😂
can someone please explain to me why we can just divide degrees by pi which is in radians?? why at the end, did he just take the degrees° sign off of the 180 and divide it by pi. how does this work. thank you.
If you need to convert units -
degrees to radians ... multiply by (pi/180)
radians to degrees ... multiply by (180/pi)
180 degrees is equal to pi rad. Multiplying a circle's radius (radian) by pi (pi radians) will give half the circle or 180 degtees. Diving the two (180 and pi rad) will give you 1. It's used for conversion
Pi=180°, 2pi =360°
Because 180 degrees and pi represent the same point on the unit circle. If you take 180 degrees and divide it into units of pi (the equivalent point in radians) you will get the number of degrees in 1 radian. As for dropping the degrees, it's similar to how in story problems you often will omit the units of ft or cm or whatever and add them back in at the end. It's not technically correct but is extremely common.
thx
Thanks I've got a math test today
Super-Big help - Jeff, BSEE 1976
You forgot about x^2 + y^2 = 1 From where you get other trigonometry ecuations.
>ecuations
It's actually cos ^2 θ + sin ^2 θ = 1
@@omariqbalhamid280 Are those not the same?
@@judgementcl they are
Lets get it
So you are telling me, electrical engineers at your place study such basic trigo which i was taught in grade 8?
Your name suggests that you might not be American. I want you to lower your expectations on the education we get here.
@@imapanda2434 I'm in America and this is 9th-10th grade stuff where i am????
@@user-kt1no7yx1u Yes, quality of education varies wildly depending on which school district you are in, usually correlated with economic class, like most things here.
Don't mind me, just taking the act next week.....
Isn't y/x 'run over rise' in that example? And isn't x opposite, not adjacent?
No to both questions and I'll explain. So however many units long "a" would be can be counted by number of units right from 0 on the x-axis; however many units high "o" would be can be counted by however many units high on the y-axis. As for your other question, y is high and x is long- rise/run.
Ahak wala ko kasabot
boces