Law of Cosines: Find an Angle - VividMath.com

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Use the Law of Cosines (Cosine Rule) to find a Missing Angle in a Non-Right Angled Triangle.
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[@VividMath]

Depending on your calculator: • *[ Shift ]* is the same as *[ 2ndF ]* and *[ INV ]* • *[ DMS ]* is the same as *[ ° ‘ ‘’ ]*

[@Skitt0407]

this guy be saving lives fr

[@moallam7685]

3:27 "ok now, we're looking for cosby" yeah try not to get roofied tho

[@Eren92812]

lmao thought the exact same thing haha

[@armorvestrus4119]

He explains this so well.❤

[@robloxmaster2096]

I love the way u explain this but the triangle doesn’t always have to be named ABC so what I shall do in this case 😢

[@asnee100]

He’s voice is so Soothing

[@pineapples234]

Pause ??

[@coldeditor69]

​@@pineapples234 resume

[@armorvestrus4119]

As I was trying to rap my head around this the rubber-band snapped and my brain melted.

[@guthrowtaylorjohnson5758]

AAAAAAA, LEAVE 4/81 as a FRACTION, You will contaminate the EQUATION. Is no one else bothered by this?

[@mikei6605]

worked! thank you this was a help. I forgot it was cos-1 tho

[@topgpe]

you always have to use cos-1 if you want to find an angle

[@jonathanhele0886]

Thankyou that's very clear!

[@jamesbutton5036]

cos-1(0.0476) on my Casio was coming up with 1.523178333??? might my calculator be broken or something?

[@topgpe]

have you got the right settings active????

[@ravenstinson8318]

You must have had it on RAD instead of DEG mode

[@dongertan3320]

Thanks for this video sir.

[@zactatonetti6442]

Legend.

[@Brittt123]

Thank you sir u helped me so much

[@minyngi3319]

Yeshhshshs Finally I can do math work

[@parvinzaman5863]

I really cant hear you please fix that other than that thank you so much ♡♡♡

[@voldy3565]

What if I don't know big C or small c?

[@skywasfound6371]

small are sides big are angles

[@tizianorosso3288]

whats your name?

[@sampsonahomah3264]

The writings of the speech on the screen tend to block the view of those of us who follow the tutorials online.

[@franciscoprieto1534]

This guy looks like David Gahan from Depeche Mode.

[@re5had390]

Nice

[@aliceyoon9048]

Come backkk ;((

[@casandraogrady5793]

It's meant to be Cos B equals 7squared plus 6squared - 9squared divided by 2 x 7 x 6? Cos B equals 49 plus 36 - 81 divided by 85 Cos B equals 4 divided by 85 0.047 and so on ...

[@ajnabiatrab9481]

thanks for the video but I need. a video where u will tell us when to use which formula of cosine rule plzzzzz

[@moallam7685]

no 14 x 6 = 84 not 85

[@ssb_kirito4056]

bruh wat 7 square + 6 square = 85 howd yu get 49….

[@thexforo]

Only 7 squared is 49

[@omomar56]

I got 61.57

[@funitoo]

and again... no mention of what Cos is... useless

[@Paul-ob2hy]

Tad Ka this is higher trigonometry, you shouldn’t be looking here for what trigonometric ratios are. try typing this: Trigonometric Ratios.