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Find the missing length of a triangle using the cosine function 

Brian McLogan
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👉 Learn how to find a missing side length of a right triangle. A right triangle is a triangle that has 90 degrees as one of its angles. The trigonometric identities of right triangles give us the relationship between the angles of a right triangle and the side lengths of the right triangle. These trigonometric identities, commonly called SOHCAHTOA, are: sin x = opposite / hypothenuse; cos x = adjacent / hypothenuse and tan x = opposite / adjacent. These identities enable us to find a missing side length of a right triangle given one of the side lengths and one of the other angles of the right triangle.
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2 окт 2024

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Комментарии : 62   
@eddierocha6010
@eddierocha6010 4 года назад
Even after 8 years he still helps solve problems
@its_anonymous1289
@its_anonymous1289 3 года назад
My teacher just doesn’t post the notes and moves fast asf and gives work everyday
@franklinjoaquinschoenich5964
@franklinjoaquinschoenich5964 3 года назад
@@its_anonymous1289 mine explains horribly and still uploads work everyday
@chelseaclarke8474
@chelseaclarke8474 2 года назад
After 10 now!
@muhammadzakria4426
@muhammadzakria4426 Год назад
10 year's Buddy 😂
@GusGusGames
@GusGusGames Год назад
@@its_anonymous1289Mrs.Nahan
@kevinkeane5045
@kevinkeane5045 3 года назад
How is 4 minutes better than a week of online school
@jayff3765
@jayff3765 3 года назад
Lol
@Yagon-ue7xm
@Yagon-ue7xm 3 года назад
I’m just gunna watch the video instead of paying attention in school
@chipbat
@chipbat 3 года назад
Same
@johanhernandez5308
@johanhernandez5308 3 года назад
Same
@iwxaithyt4183
@iwxaithyt4183 3 года назад
Fr
@jediknight9371
@jediknight9371 4 года назад
thanks! I finally understand the "sin cos and tan" on the calculators😂 (I'm doing math 10 summer school this year)
@user-ot5qf5xm7m
@user-ot5qf5xm7m 3 года назад
hey, me too would you like to help me?
@aaryanagarwal4330
@aaryanagarwal4330 3 года назад
@@user-ot5qf5xm7m no
@skull3758
@skull3758 3 года назад
Man this is so helpful, I don't pay any attention in math class, so this is short and gets straight to the point thankyou so much, now I wont fail math.
@musicaccount3175
@musicaccount3175 3 года назад
the fact that this literally just taught me how to do it instead of my teacher and it was 9 years ago
@KendaBeatMaker
@KendaBeatMaker 3 года назад
Jason Kidd
@MoonBro
@MoonBro 3 года назад
why is this dude the only one who shows up when i need help with geometry lol
@alexjenixz6813
@alexjenixz6813 3 года назад
Man studied math for 10 years and knows everything lmao😂😂
@zackschmidt4256
@zackschmidt4256 3 года назад
alpha males learn trig during the exam
@jorgef1962
@jorgef1962 3 года назад
Im failing geonetry class with a 50 an F cuz i find this hard in class but these youtube videos help
@kat.ex3909
@kat.ex3909 3 года назад
I am so glad that this video went straight to it, my teachers had us do this for a whole week and I didn't understand and this person helped me in 3 mins, thank you
@egreaux19811
@egreaux19811 Год назад
I have a question, how do you know to make the adjacent side x and not the opposite side?
@abnercricket
@abnercricket Год назад
Whichever side you're trying to find will be x
@RaidKillerX
@RaidKillerX 3 года назад
I just watch his video of how to find the missing side by using sine, cosine, and tangent and it help me a lot.
@evamcaslop4770
@evamcaslop4770 4 года назад
👏🏼
@orangebetsy
@orangebetsy 2 года назад
Since the opposite side of unknown length could also be called x, wouldn't sin(15) = x/10 too? Yet 9.7 doesn't seem right just looking at the triangle.
@IGATECK
@IGATECK 2 года назад
I'm probably not the group of people you wanted to help but thanks anyway, now I can calculate my bullet drop when shooting downhill or uphill
@brianmclogan
@brianmclogan 2 года назад
Real world applications, happy to help!
@cbucks6613
@cbucks6613 2 года назад
I spent the whole year of school not being able to understand cosine and it was this easy...
@brianmclogan
@brianmclogan 2 года назад
Awesome I love it!
@codyhutchison3016
@codyhutchison3016 6 месяцев назад
your videos have been so helpful through all of my Math, I love your channel!
@harrymatabal8448
@harrymatabal8448 5 месяцев назад
If the figure is missing a leg then how can you say it's a triangle. You don't have a leg to stand on. 😂
@abnercricket
@abnercricket Год назад
We don't have calculators we're also not allowed to use calculators during test so finding cosine of 15° is impossible unless you could teach that we have the formulas we know what formulas to use
@audiblewilcox9085
@audiblewilcox9085 10 месяцев назад
ok how do you solve for thetha?
@lemonz903
@lemonz903 Год назад
It’s brain mclog
@HOnEy_WaFeR
@HOnEy_WaFeR Год назад
Khan academy has met its match
@flamingadinga7643
@flamingadinga7643 2 года назад
3:00
@PhoebeKeleitse-fy2il
@PhoebeKeleitse-fy2il 5 месяцев назад
How do we add a degrees
@Kwibby3478
@Kwibby3478 3 года назад
Online school is a bad way of teaching my god, this is actually easy
@daequanhendricks3406
@daequanhendricks3406 Год назад
Best video ever can’t believe this was 10 years ago thank you
@xxbone55crusherxx
@xxbone55crusherxx Год назад
I don't get it
@ily.niaa_
@ily.niaa_ 3 года назад
What would be the answer for the opposite side or like how to solve it?
@liampenner8865
@liampenner8865 3 года назад
I would just like to point out that he’s super close to 1 mill
@goose827
@goose827 Год назад
i love you
@anonymous896
@anonymous896 3 года назад
God fucking bless you 💋❤️
@mrswr6756
@mrswr6756 2 года назад
why and how does 15 round to .97
@yjz4609
@yjz4609 2 года назад
i'm also wondering
@chuudes
@chuudes Год назад
@@yjz4609 because when you type “cos(15)” into a SCIENTIFIC calculator, you get about 0.965, then round it to 0.97 or .97! hope this helped 💪
@FauxReal.
@FauxReal. 2 года назад
answer wasnt even right
@MrLaganicca
@MrLaganicca 8 месяцев назад
Bro he rounded it
@doot9449
@doot9449 2 года назад
Came in clutch, love you
@inkedaurora
@inkedaurora 3 года назад
RU-vid is wonderful
@johnsadler3601
@johnsadler3601 2 года назад
Good teacher
@hatdoghatdog1570
@hatdoghatdog1570 3 года назад
vivi best girl
@braydenporter7014
@braydenporter7014 3 года назад
still helpful lol
@cheriexbearr249
@cheriexbearr249 3 года назад
thank you!
@Grazeee
@Grazeee 2 года назад
DUDE THIS HELPED SO MUCH THATNK YOU
@brianmclogan
@brianmclogan 2 года назад
You are very welcome!!
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