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Law of Sines and Law of Cosines (4 Examples)

Learn how to work with the law of sines and the law of cosines in this video math tutorial by Mario's Math Tutoring. We discuss when to use the law of sines and law of cosines as well as going through 4 unique examples. We discuss how to solve for the missing side or missing angle in a triangle.
Related Videos to Help You Succeed:
Ambiguous Case Law of Sines
• Ambiguous Case Law of ...
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Пікірлер: 127

  • @rooftoptrading461
    @rooftoptrading4618 ай бұрын

    Mr Mario. as a dad who forgot all his math I have to thank you for putting this together. It makes helping my kids a breeze. Thank you.

  • @MariosMathTutoring

    @MariosMathTutoring

    8 ай бұрын

    Awesome! Thanks for letting me know! Glad my videos can help your family out!

  • @Techmatt167Official
    @Techmatt167Official3 жыл бұрын

    This man needs a cookie for saving us all from online learning

  • @rebelalliance1883

    @rebelalliance1883

    3 жыл бұрын

    You guys still have online school, I have been in full time since September

  • @lejouve8000

    @lejouve8000

    2 жыл бұрын

    Or sum shampoo

  • @christiandeocampo7533
    @christiandeocampo75332 жыл бұрын

    Sir, you are great teacher Because unlike any youtube tutorial videos your voice is loud and clear, your examples are brilliant and The best of all it's completely free... Thank you so much Sir You were such a big help for me

  • @klasrem
    @klasrem Жыл бұрын

    This video is a life saver. I want to say you taught this in a much easier to understand way than my teacher did in a week. Granted, I didn't pay much attention on Sines, but I did with Cosines, and I now have a clear understanding of both. My teacher never mentioned anything about Cosines being used on SSS and SAS triangles. You have a really good way of teaching this stuff. Good job!

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    Glad it helped!

  • @diamond1628
    @diamond16284 жыл бұрын

    My guy this was perfect timing I just learned this today. THANK YOU SO MUCH

  • @MariosMathTutoring

    @MariosMathTutoring

    4 жыл бұрын

    You’re welcome! I’m glad this video arrived at the right time for you!

  • @sleepyhead4512

    @sleepyhead4512

    3 жыл бұрын

    Let me guess,11th grade?

  • @captainobvious6668

    @captainobvious6668

    3 жыл бұрын

    Nah 8th grade

  • @chairmanmao112

    @chairmanmao112

    2 жыл бұрын

    @@captainobvious6668 username check out.

  • @neodong6060
    @neodong6060 Жыл бұрын

    Mario's explanations and examples are amazing. He makes learning the material so many times easier, and the fact that he's doing this for free and out of the good of his heart is amazingly gracious. He's the math teacher we all wanted, but didn't deserve. Someone give him a cinnabon

  • @abdullahfarid1091
    @abdullahfarid10913 жыл бұрын

    This video is the only thing I actually learned during online school lollll

  • @camilaben
    @camilaben3 жыл бұрын

    Super helpful! Needed an extra bit of review and this was perfect!

  • @corsonforcas
    @corsonforcas2 жыл бұрын

    It was this easy!? Wow thank you so much, you thought me what 3years of private high school couldn't! Thank. You sosososo much

  • @angelvilla1952
    @angelvilla19522 жыл бұрын

    This dude taught me more in 9 mins then my teacher did in 2 weeks

  • @williamposthumus8133
    @williamposthumus8133 Жыл бұрын

    Dude this helped so much I was gone the day we learned this and had no clue what was going on but after this video I’m feeling great about these problems now. Thank you so much!!!

  • @salvatoreverlingo3193
    @salvatoreverlingo31933 жыл бұрын

    yo just helped me past my test you are a living legend

  • @deadloverboy9519
    @deadloverboy95193 жыл бұрын

    I really frustrated with this due to taking it online, but this video has helped me understand it more thank you.

  • @dustinprice6043
    @dustinprice60432 ай бұрын

    You have a great way of explaining things so that they make sense, giving the reason behind why things are being done and providing ways to memorize things in an effective way. Thank you for this gift.

  • @MariosMathTutoring

    @MariosMathTutoring

    2 ай бұрын

    Glad it was helpful!

  • @wangnguyen9854
    @wangnguyen98544 жыл бұрын

    You couldn't have posted this video at a better time. You da man

  • @MariosMathTutoring

    @MariosMathTutoring

    4 жыл бұрын

    Glad my video arrived at the right time for you Wang!

  • @morningdew20
    @morningdew203 жыл бұрын

    Ack! Thank you so much for this! I was totally confused on this until I saw your video! Thank you so much!

  • @pogi2555
    @pogi25554 жыл бұрын

    Very helpful! thank you mario

  • @MariosMathTutoring

    @MariosMathTutoring

    4 жыл бұрын

    Glad my video helped you!

  • @seyakei8052
    @seyakei80523 жыл бұрын

    My s.y just ended but i have a lot of activities i missed and this helps me a lot thank u and the fact that the video is short but understandable really thank u

  • @NaomisDream
    @NaomisDream2 жыл бұрын

    Getting some last minute studying in before my final! Thank you 🙏🏼

  • @alfredsanford5765
    @alfredsanford57653 жыл бұрын

    Wow. This makes so much more sense now

  • @shambali4173
    @shambali41732 жыл бұрын

    Well I've got the equivalent of a leaving cert or a GCSE exam coming up to finish high school and I'm glad I found your videos!

  • @jasonhardwood4819
    @jasonhardwood48192 жыл бұрын

    My teacher made it so much long then it should have been for the equations thank you I hope I do well on my test!

  • @fabiookonolanguages
    @fabiookonolanguages3 жыл бұрын

    Thank u bro!! I watched a lotta Brazilians teachers but I can't learned it very well, u helped so much!!

  • @DrDanTeaches
    @DrDanTeaches Жыл бұрын

    Great summary! Thanks for the comprehensive approach. I'll be posting this video as a reference for my students.

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    Awesome! Thanks!

  • @ShabowG
    @ShabowG2 ай бұрын

    MARIO THANK YOU SO MUCH YOU JUST SAVED ME

  • @josiahrutledge8152
    @josiahrutledge81522 жыл бұрын

    Thanks man, great teaching. Helped me out a ton

  • @MuhaddisaSarwari
    @MuhaddisaSarwari2 жыл бұрын

    This was extremely simple and helpful, thank you so much!!

  • @sal4383
    @sal43834 жыл бұрын

    dude you’re fking awesome my geometry teacher is awful and doesn’t teach anything but with you i’m CHILLING. god bless bro

  • @MariosMathTutoring

    @MariosMathTutoring

    4 жыл бұрын

    Glad you are liking my videos Sal.

  • @nikolasmaillis6862
    @nikolasmaillis68623 ай бұрын

    I never understand my algebra and geometry teacher, and Mr. Mario, you always have the 10 minute videos that explain clearly what she tried to teach me in 2 hours. 😁

  • @MariosMathTutoring

    @MariosMathTutoring

    3 ай бұрын

    Wow, thanks!

  • @IODell
    @IODell2 жыл бұрын

    Long time viewer. Great instructive videos. Thank you.

  • @NANACOM342
    @NANACOM3424 ай бұрын

    Thank you so much this is easy to understand!

  • @MariosMathTutoring

    @MariosMathTutoring

    4 ай бұрын

    Glad it was helpful!

  • @nakul.singh.156
    @nakul.singh.1563 жыл бұрын

    Thank you so much sir , helped me a lot . Hearty thank you from an Indian .

  • @ammarabushaqra3158
    @ammarabushaqra31583 жыл бұрын

    Thanks now I’m ready for this exam

  • @GiornosArm
    @GiornosArm Жыл бұрын

    Great video, helped a lot in collage cause I had forgotten about most of this stuff from highschool

  • @Zetrro
    @Zetrro5 ай бұрын

    Learned this 3 years ago, forgot it, need it for SAT, now i know it. Thanks so much.

  • @MariosMathTutoring

    @MariosMathTutoring

    5 ай бұрын

    You’re welcome! Best wishes to you on the SAT!

  • @oscarpeterarcuna5400
    @oscarpeterarcuna5400 Жыл бұрын

    Thank you so much, you make MATH challenges understandable and it may not be easy but we can learn from you.

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    Happy to help

  • @johnnychong3050
    @johnnychong30503 жыл бұрын

    Thank u so much, i always learn better in ur videos and the equations and style is similar or identical on whats taught on my class.

  • @Cytoskelton
    @Cytoskelton2 ай бұрын

    love this guy. Hope you are doing well.

  • @Heimsendir
    @Heimsendir9 ай бұрын

    After serving 9 years in the Navy and trying to go back to school, your video's have been amazing, thank you and I hope you are doing well.

  • @MariosMathTutoring

    @MariosMathTutoring

    9 ай бұрын

    Thanks so much for your positive comment. Glad my videos have been helping you.

  • @kaynvx
    @kaynvx5 ай бұрын

    this video literally saved my life tysm

  • @son-ce3gr
    @son-ce3gr2 жыл бұрын

    hey what if you’re given a triangle without labeling sides ABC respectively and there’s a missing angle at the top?

  • @CookiehsAndDreams

    @CookiehsAndDreams

    2 жыл бұрын

    I might be a little late on this and I don't fully understand it either, but if you have the angles of the other two sides, you should be able to just subtract those two angles from 180, you should be able to get the missing angle. I might be wrong, but I hope I could help a little!

  • @Bikramthapa10
    @Bikramthapa10 Жыл бұрын

    Thank you Mario, goat teacher

  • @Pe4rls2
    @Pe4rls2 Жыл бұрын

    bro is a prodigy at teaching math fr

  • @chandynasty4966
    @chandynasty4966 Жыл бұрын

    Thank you so so much with this video! It really helped since my geometry teacher doesn't teach us!!

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    Glad it helped!

  • @Lisa-en3em
    @Lisa-en3em4 жыл бұрын

    Thank u sir khan academy is stressing me out and this helped a lott

  • @MariosMathTutoring

    @MariosMathTutoring

    4 жыл бұрын

    Glad my video helped you Lisa!

  • @hahyunrin
    @hahyunrin5 ай бұрын

    Thank you so much! Tbh, I understand this a lot more than studying in my class

  • @raymondallenjhangiani7670
    @raymondallenjhangiani76704 ай бұрын

    Fantastic 🙏 truly appreciate very much 🙏🙏🙏 awesome teaching skill 😇👍 thank you sir !

  • @omega3594
    @omega35942 жыл бұрын

    Hi! at 8:28 shouldnt it be +198 to cancel -198? why is it also negative?

  • @learnology3611

    @learnology3611

    Жыл бұрын

    Yah u r right

  • @Tanner_777
    @Tanner_7775 ай бұрын

    Thank you!

  • @MariosMathTutoring

    @MariosMathTutoring

    5 ай бұрын

    You're welcome!

  • @wertyboy8704
    @wertyboy87043 ай бұрын

    you made me pass my test by .82% thankyou so much :D

  • @wertyboy8704

    @wertyboy8704

    3 ай бұрын

    wouldnt of been able to do it without your help :DD

  • @MariosMathTutoring

    @MariosMathTutoring

    3 ай бұрын

    Great job!

  • @user-zg6ce9zz3e
    @user-zg6ce9zz3e6 ай бұрын

    thank you so much you helped me and my grade:)

  • @MariosMathTutoring

    @MariosMathTutoring

    6 ай бұрын

    Happy to help!

  • @mondolawrancearmba
    @mondolawrancearmba9 ай бұрын

    Awalys impressive and understandable teaching... keep it up sir

  • @noyonika3415
    @noyonika34153 жыл бұрын

    anyone else's teacher not teaching them and giving them these videos instead? rip

  • @almondtofu9394
    @almondtofu93942 жыл бұрын

    Thank you soo much 😭😭 I hope your pillow is always cold have a good night 🤩🤩

  • @user-zv5ik3ei4h
    @user-zv5ik3ei4hАй бұрын

    For the first question what do I type in the calculator?

  • @jasminewhitehead1752
    @jasminewhitehead17522 жыл бұрын

    I’m in a college trig class online over the summer. Lemme tell u. This video helps me understand. I need someone to explain it to me.

  • @user-mq8pw6oi7g
    @user-mq8pw6oi7g8 ай бұрын

    Thanks sir, it was very helpfull

  • @MariosMathTutoring

    @MariosMathTutoring

    8 ай бұрын

    Glad to hear that!

  • @justsomekid5971
    @justsomekid59712 жыл бұрын

    I like how he simplifies things.

  • @ohhesnumb4409
    @ohhesnumb4409 Жыл бұрын

    W teacher!

  • @mkkkk1643
    @mkkkk16432 жыл бұрын

    Ur Brian is so bright under the light

  • @noahwilmerdevera4384
    @noahwilmerdevera4384 Жыл бұрын

    How did you get the the 96 in 8:45 ??? Can you pls explain sir

  • @wxrd_
    @wxrd_ Жыл бұрын

    2:02 why did u multiply by 6, is there any other way to solve without multiplying by 6?

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    You want to get the sinC by itself….another option is to cross multiply to get rid of the fractions. Hope that helps!

  • @vkaygee

    @vkaygee

    9 ай бұрын

    @@MariosMathTutoring how did you get the .805 and what did you multiply to get 53.7?

  • @chellianrainnefrias8695
    @chellianrainnefrias86952 жыл бұрын

    Thank u so much for explaining this,but when it's comes at the end of (Bcos)I still don't understand how did you get the 225=121×81-198cosB

  • @henrycentore7978
    @henrycentore79783 жыл бұрын

    good shit mario

  • @pillowyflunky9931
    @pillowyflunky99312 жыл бұрын

    thanks

  • @jojimmanuay6712
    @jojimmanuay67123 жыл бұрын

    Thank you johnny sin teacher

  • @issaarenaaraneta4908
    @issaarenaaraneta49082 жыл бұрын

    thank you sir! 🙌🏼❤️

  • @bitoraima3435
    @bitoraima34353 жыл бұрын

    An 18m cable is connected to the top of a 14m radio mast and fastened to the ground at an angle theta to the horizontal. 1. Draw a diagram to illustrate the problem? 2. Calculate the theta in degrees correct to 2 decimal places? Post your ASAP??

  • @leeno44
    @leeno44 Жыл бұрын

    I just need help with the calculator how did u get .805 I couldn’t get it

  • @hasratullah7386
    @hasratullah7386 Жыл бұрын

    Great 👍 sir.

  • @erikabiggs6501
    @erikabiggs65012 жыл бұрын

    Hey just a little thing but maybe show us what your calculators says zoom into the calculator or show the camera it so we can see the weapons you push

  • @molindahenry6748
    @molindahenry67482 жыл бұрын

    How do we plug in the cosine ratio into the calculator because I keep getting larger numbers instead of 6.7 6:37

  • @martinaabunacion1611
    @martinaabunacion16113 жыл бұрын

    Thank you sir

  • @aissatudrammeh807
    @aissatudrammeh8072 жыл бұрын

    thank you you helped A LOT!!! may god reward you

  • @thropops138
    @thropops138 Жыл бұрын

    in 5 minutes you explained what it took my teacher like 7 weeks to even do half

  • @snebbs25
    @snebbs256 ай бұрын

    At 2:36 he says that the angle is 53.6 but when I put it into the calculator I got 53.61 so wouldn’t it be 53.6? I’m so confused 😢

  • @ashakirdak4897
    @ashakirdak48974 жыл бұрын

    Will you explain ? (e^ix)= cos x +i sin x With examples

  • @cal8869

    @cal8869

    3 жыл бұрын

    im asuming that you figured it out

  • @oliviapositano8145
    @oliviapositano81457 ай бұрын

    Can you explain how you got 6.7 in the first cosine law example

  • @MariosMathTutoring

    @MariosMathTutoring

    7 ай бұрын

    This more recent video I did may explain it better for you: Law of Sines and Law of Cosines (Complete Guide) kzread.info/dash/bejne/qmST2LVqZNC7pJM.html

  • @oluwakemijoy6291
    @oluwakemijoy62913 жыл бұрын

    I hope I can get a few things from this video

  • @bambiii787
    @bambiii787 Жыл бұрын

    Wait how did you multiply by inverse of cosine with no degree measure

  • @-clipz-
    @-clipz-6 ай бұрын

    God bless

  • @Wesso2803
    @Wesso2803 Жыл бұрын

    bro saved my ass, thank you.

  • @mightyjames6579
    @mightyjames65792 жыл бұрын

    what iff theres no degrees or number inside the triangle

  • @kuroe5868
    @kuroe5868 Жыл бұрын

    help how do I get the inverse cosine on the calculator? TT

  • @MariosMathTutoring

    @MariosMathTutoring

    Жыл бұрын

    Usually have to press the ‘2nd’ key first then sine, Cosine, or tangent

  • @LongingAsp
    @LongingAsp3 жыл бұрын

    Yeah I have a quiz on this tomorrow but I can't get the calculations to work out. I put the law of cosine problem into my calculator and I get a totally different number than what you got

  • @ryderdarden2152

    @ryderdarden2152

    3 жыл бұрын

    Did you ever figure it out on why it was different

  • @alexaltman8106

    @alexaltman8106

    3 жыл бұрын

    @@ryderdarden2152 probably cause it was in radians mode instead of degree mode

  • @chrisvfx3737
    @chrisvfx37372 жыл бұрын

    Yo bro I approve Strucid

  • @mikasantos5723
    @mikasantos5723 Жыл бұрын

    3:53

  • @eddyherfst2923
    @eddyherfst29232 жыл бұрын

    👍

  • @WWEfan051905
    @WWEfan0519052 жыл бұрын

    Still dumb cause i still dont know how to solve for the last side on the first example😂