Law of sines | Trig identities and examples | Trigonometry | Khan Academy

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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 it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

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[n]

the raw power in how he casually notes that in a later video he will prOVE the law of sines is exhilarating

[empirehypnosis]

Spaced out during discussion. This is actually surprisingly simple.

[jeffreyschumacher]

Thank you so much man I had a test for trigonometry and this was the only thing I dind't get at first. I got 90% on it

[cherrycheese]

This channel is the only reason im passing math

[jjmanson]

Made it MUCH more complicated than it really is with NOT just cross multiplying and having more accurate numbers than if you do the approximate from the beginning. But it's your prerogative on which you method you like best.

[narekkazarian]

Great memory refresh for Law of Sines. Thank you Sal

[HamzaAbdulFattah]

RIP everyone with 2 sides and an angle watching till the end

[Ebruhhk]

Im failing math. ☹️️ this shit is top hard

[griffinleggieri]

Why don't you just cross multiply?

[AndreatheSupremeCommander]

May God bless your soul. I needed so much help. Thank you so much :)

[cullenwilliams]

My teachers do a horrible job of explaining this, this is so much simpler then I thought

[matthewhickling]

imagine getting through highschool math without khan academy

[GeoMathLab]

Always a pleasure viewing videos from the veteran of online teaching. Working my way to get to your level, Mr. Khan. 💯😎

[onedgivesmelife]

Topped the class bc of this THANK YOUUU

[omegamagna]

Why does every other video I look up not make it this simple?

Khan Academy coming in clutch again

[KarlSnyder-jhic]

I like the lecturer's style. I know this prob is easy like pie, but I gotta start somewhere.
Excelsior!

[louieryannadela]

In the side b you can just put b=4sin 45°=2.828 and round off it and the answer is 2.83

[mariobros]

10% of the video: actually explaining what to do

90% of the video: a bunch of random stuff we don't need to know

[csfhusker]

this service deserves WAY more money then 70 thousand dollars

[iamy]

I text book says the equation is a/sinA=b/sinB=c/sinC