# Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy

Video duration: 9:17
Introduction to trigonometry

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Trigonometry on Khan Academy: Big, fancy word, right? Don’t be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (“trig” as…

## 41 thoughts on “Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy”

#### Danish Rehman

(November 8, 2019 - 6:21 pm)

Some people have,
Curly brown hair,
Through proper brushing.

Hope this helps you out
Note: P is perpendicular which is the same as opposite. B is the base or adjacent side

#### Snowflake

(November 8, 2019 - 6:21 pm)

Who else is here just because the are bored in class and wants something more exciting?

(November 8, 2019 - 6:21 pm)

#### Zhiyue YANG

(November 8, 2019 - 6:21 pm)

What if x was the right angle? Then does the hypotenuse change to another one, since it would then be the opposite?

#### Ghosty

(November 8, 2019 - 6:21 pm)

Wow

#### Ophiuchus123456789

(November 8, 2019 - 6:21 pm)

I love the way he always slowly repeats the occasional word.

#### azuur asmr

(November 8, 2019 - 6:21 pm)

22 and going into college and I'm still reviewing this stuff

#### jaju shah

(November 8, 2019 - 6:21 pm)

No one here but always finding the simplest way of beating your failure! Khan academy always good and preaching most simply ever on youtube! Hats off to ur gud work!😁😁😁it always helo me being a brown kid…

#### Lambinroz Rozario

(November 8, 2019 - 6:21 pm)

What he did in 9 minutes, my teacher failed to do in 3 months

#### Dipp0x

(November 8, 2019 - 6:21 pm)

Math test tomorrow wish me luck

#### em luu

(November 8, 2019 - 6:21 pm)

Who else is just wanting to be top for maths so they could get something like a pc?

(November 8, 2019 - 6:21 pm)

we can also learn sin cos tan by
sin – some people have
cos – curly black hair
tan – through proper hairbrush

#### Katie Jones

(November 8, 2019 - 6:21 pm)

Shoutout to my brain for forgetting basic trig the night before the SAT

#### welette .

(November 8, 2019 - 6:21 pm)

going over this again before school starts

#### Dan Hughes

(November 8, 2019 - 6:21 pm)

667

#### Beybrain78

(November 8, 2019 - 6:21 pm)

This is called the Art of le Illuminati my friends.

#### IPSoft Creations

(November 8, 2019 - 6:21 pm)

compare this vid with the vid he made 12 yrs ago : https://www.youtube.com/watch?v=F21S9Wpi0y8

#### james Micallef

(November 8, 2019 - 6:21 pm)

How do I rewrite this to get the same answer without using the TAN and PI() "45*TAN(45*PI()/180)" I tried this but it only kinda works as its missing the TAN "=45*(45*3.2/180) Thanks

#### kanna the ruler

(November 8, 2019 - 6:21 pm)

Tuuu

#### Cereal Killer

(November 8, 2019 - 6:21 pm)

This is why I donate \$10 a month. It’s worth it. How much do you appreciate Khan Academy?
👇🏻

(November 8, 2019 - 6:21 pm)

It must have been hard for you to speak and draw while also changing colors. Good job

#### Alex Santos

(November 8, 2019 - 6:21 pm)

who else is here for self indulgence

#### #thE CommentatoR

(November 8, 2019 - 6:21 pm)

thanks

#### Hercules

(November 8, 2019 - 6:21 pm)

Thx to this video I learned about it in 9 minutes when i couldnt in the week that my teacher was explaing this.

Now im prepared for my exams tommorow

#### Srikavya Balu

(November 8, 2019 - 6:21 pm)

Who's here because they were curious 'bout trig

#### Moviz Khalid

(November 8, 2019 - 6:21 pm)

Legend has it people still Find this 8 year old video more informative than their professor

#### miss squish

(November 8, 2019 - 6:21 pm)

everyone's here bc of their schoolwork while i'm just like "hi im only in seventh grade and im taking the SAT in 7 days ahahaha"

#### Toshio

(November 8, 2019 - 6:21 pm)

The Trigonometry class I'm taking starts in two weeks I plan to watch all your videos on the subject Khan Academy I learned a lot from this one 9min video and I want to learn more!

#### MoonShark 21

(November 8, 2019 - 6:21 pm)

This helped me soooo much!! Thank you!!

(November 8, 2019 - 6:21 pm)

Where did u get 5 and 4 from

#### Senuth Dawundage

(November 8, 2019 - 6:21 pm)

Thank you sooo much 🙏

#### Gabby Kelly Patterson

(November 8, 2019 - 6:21 pm)

khan academy has been a good help to me…………thanks guys……..and I really enjoy the app

#### Alex

(November 8, 2019 - 6:21 pm)

I hope this is the only thing in Trigo.

#### REK LESS 187

(November 8, 2019 - 6:21 pm)

When I was learning how to get the circumference of a circle i was told to enter in the diameter and push the pie button on my calculator weeks later I ask what is pie how did it come to be?
His response was. You were shown that on the calculator this is maths not history.
good news I passed year 10 maths

#### Chunky Chanka

(November 8, 2019 - 6:21 pm)

Anyone here cause there math teacher left🗿

#### AirForceDave

(November 8, 2019 - 6:21 pm)

best instruction on this subject i have found. well done, and THANK YOU!~! great explanation and glad you did the big picture overview before diving in.

(November 8, 2019 - 6:21 pm)

Very good useful video

#### Angel Robledo

(November 8, 2019 - 6:21 pm)

#### Debasish Ghosh

(November 8, 2019 - 6:21 pm)

Who else is here before the beginning of class 10 and will be here before board exams.

#### Willis TBG

(November 8, 2019 - 6:21 pm)

Much Love man you helped me a lot bro😴🤜🏾

#### Helen Yao

(November 8, 2019 - 6:21 pm)

I’m like failing geometry lord help me