Quoc Dat Phung

Quoc Dat Phung

Hi there! My name is "Quoc Dat", and "Phung" is my last name. I love creating content and making tutorials about math and coding on KZread!

Integral of cos(2x)

Integral of cos(2x)

Integral of e^(x+e^x)

Integral of e^(x+e^x)

Integral of x²/(x+1)^3

Integral of x²/(x+1)^3

Integral of x^3/(x^2+5)^2

Integral of x^3/(x^2+5)^2

Пікірлер

  • @kingaj4252
    @kingaj425217 сағат бұрын

    Amazing Bro ...Learned from Afghanistan

  • @bawablax
    @bawablax18 сағат бұрын

    Sir I can assume C to be any value right ?

  • @oeunbunsan2509
    @oeunbunsan25092 күн бұрын

    Hello, brother Could you please talking about Counting sort😊

  • @QuocDatPhung
    @QuocDatPhungКүн бұрын

    I'm working on it! So far I have videos on selection sort, insertion, bubble, mergesort, and quicksort! You can find them here: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @oeunbunsan2509
    @oeunbunsan2509Күн бұрын

    @@QuocDatPhung I already watched all of your videos many time and you are the best DSA teacher😊❤️️

  • @QuocDatPhung
    @QuocDatPhungКүн бұрын

    @@oeunbunsan2509 Thanks so much! I really appreciate it! :D

  • @lephattai6841
    @lephattai68413 күн бұрын

    ❤ cảm ơn e. A đã giải được rồi. Quá nhanh và đơn giản dễ hiểu

  • @QuocDatPhung
    @QuocDatPhung2 күн бұрын

    Cám ơn anh! Anh đăng kí và chia sẽ ủng hô em nhé!

  • @Nate3145-zt8rh
    @Nate3145-zt8rh3 күн бұрын

    Deep knowledge! I think its important for software engineers to understand the more theoretical side of things.

  • @QuocDatPhung
    @QuocDatPhungКүн бұрын

    Thanks Nate! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @pipinstallpycaret4056
    @pipinstallpycaret40563 күн бұрын

    love from India, it helps me A lot

  • @QuocDatPhung
    @QuocDatPhungКүн бұрын

    Thank you! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @negin_spc9241
    @negin_spc92414 күн бұрын

    It was the best thing that I could see right now ❤ Thank you 🎉

  • @QuocDatPhung
    @QuocDatPhung4 күн бұрын

    You're welcome Negin! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @carvelbell181
    @carvelbell1814 күн бұрын

    Excellent tutorial. I like your teaching techniques. I would love to see you do more Integration by U-Suubstition Problems. Thanks.

  • @QuocDatPhung
    @QuocDatPhung4 күн бұрын

    Thank you! I already did U Substitution, you can find it in this playlist below (pls don't forget to subscribe and share it means a lot): kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @jadhavbalasaheb2370
    @jadhavbalasaheb23704 күн бұрын

    Thank you so much

  • @QuocDatPhung
    @QuocDatPhung4 күн бұрын

    You're welcome JadhavBalasaheb! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @elaine3867
    @elaine38676 күн бұрын

    Thank you!

  • @QuocDatPhung
    @QuocDatPhung5 күн бұрын

    You're welcome Elaine! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @elizabethappiah9594
    @elizabethappiah95946 күн бұрын

    Thanks

  • @QuocDatPhung
    @QuocDatPhung6 күн бұрын

    You're very welcome! Please kindly subscribe (it means a lot)

  • @shouvikxiv
    @shouvikxiv7 күн бұрын

    func TernarySearch(arr []int, length int, target int, mid1 int, mid2 int) int { if length != 0 { if target >= arr[0] && target <= arr[len(arr)-1] { if target == arr[mid1] || target == arr[mid2] { if target == arr[mid1] { return mid1 } else { return mid2 } } if target < arr[mid1] { return TernarySearch(arr[:mid1], length, target, mid1/3, mid1/2) } else if target > arr[mid2] { return TernarySearch(arr[mid2:], length, target, len(arr)/3, len(arr)/2) + length/2 } else if arr[mid1] < target && target < arr[mid2] { return TernarySearch(arr[mid1:mid2-1], length, target, len(arr)/3, len(arr)/2) + length/3 } } } return -1 } func main() { var arr = []int{1, 2, 3, 4, 5} fmt.Println(TernarySearch(arr, len(arr), 6, len(arr)/3, len(arr)/2)) } And here is my version of implementation in Go.

  • @ethanaustin_17
    @ethanaustin_177 күн бұрын

    After watching a bunch of videos I finally came across one that I understood!

  • @QuocDatPhung
    @QuocDatPhung7 күн бұрын

    Thank you Ethan! Please kindly share with your friends and subscribe to support me (it means a lot) ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @raghavs3
    @raghavs39 күн бұрын

    I have solved a lot of integration problems in my school days spending lots of hours solving complex integration problems without understanding what I was doing. I now seem to start understanding integration after many years of my college. All credit to you Quoc Dat Phung. Many Many Thanks. :)

  • @QuocDatPhung
    @QuocDatPhung8 күн бұрын

    Thank you Raghavs! Please don't forget to share with your classmates and kindly subscribe (it means a lot) ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @user-rz1et1yb4r
    @user-rz1et1yb4r11 күн бұрын

    Your lessons are very beautiful so share us the following lessons 1. Limit form the graph 2. Simpsons rule integration and its proof 3. Trapezoidal rule integration and its proof 4. Proofing formula of mean mode and median for grouped data

  • @tadesseguda3357
    @tadesseguda335712 күн бұрын

    Thank you very much, bro. your video helped me with my grade calculation.

  • @QuocDatPhung
    @QuocDatPhung10 күн бұрын

    You're very welcome! Please kindly share with your classmates and subscribe to support me. I hope my videos will help your friends as well!

  • @ax-tf9xx
    @ax-tf9xx12 күн бұрын

    Amazing Explanation brother Can you please upload more videos of Leetcode it helps a lot ! thx

  • @QuocDatPhung
    @QuocDatPhung8 күн бұрын

    Will do! Please kindly share and subscribe, it means a lot!

  • @ax-tf9xx
    @ax-tf9xx7 күн бұрын

    @@QuocDatPhung Done my friend pls upload some more i love the way u Explanation this keep goin

  • @garubahabeeb1013
    @garubahabeeb101313 күн бұрын

    This video was great, really liked the way you simplified each step and made it easy to understand 👍

  • @QuocDatPhung
    @QuocDatPhung8 күн бұрын

    Thank you Garu! Please kindly share with your friends and subscribe to support me ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @simonsays_0826
    @simonsays_082615 күн бұрын

    I love you

  • @QuocDatPhung
    @QuocDatPhung8 күн бұрын

    Thank you! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @Batman72xxx
    @Batman72xxx17 күн бұрын

    This video is wortth diamonds!!!

  • @mekabare
    @mekabare17 күн бұрын

    you’re underrated, thanks for your work!

  • @QuocDatPhung
    @QuocDatPhung17 күн бұрын

    Thank you Mekabare! Please kindly share with your friends and subscribe to support me ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @mincart9899
    @mincart989917 күн бұрын

    Wow. Area of ellipse= piab Sounds like the great city of some middle eastern country

  • @QuocDatPhung
    @QuocDatPhung16 күн бұрын

    lol :)

  • @danilsonadelino2091
    @danilsonadelino209117 күн бұрын

    What an amazing explainer, loved it <3

  • @QuocDatPhung
    @QuocDatPhung16 күн бұрын

    Thanks DanilsonAdelino! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @michaelfield743
    @michaelfield74317 күн бұрын

    How did you get rid of the square root sign at 4:50 ?

  • @QuocDatPhung
    @QuocDatPhung16 күн бұрын

    So we have the integral of sqrt(a^2cos^2) * dx. This equals the integral of acosθ * dx Since dx = acosθdθ (located in the middle of the screen) We get the integral of acosθ * acosθdθ Now we get the integral of (acosθ)^2 * dθ Let me know if that makes sense!

  • @NishaNoor-ct5nx
    @NishaNoor-ct5nx18 күн бұрын

    Could you do a video about arc length and sector of a circle? Feel like circles are under appreciated on this channel.

  • @QuocDatPhung
    @QuocDatPhung16 күн бұрын

    For sure Nisha! I did a video on arc length in this playlist, if you can go into it and Ctrl F to find it: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @SayedAli-pj1il
    @SayedAli-pj1il18 күн бұрын

    public static int FindMax(int[] arry, int max, int num) { if (arry.Length -1 < num) { return max; } if (arry[num] > max) { max = arry[num]; } return FindMax(arry , max, num + 1); } I just used one recursion method

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    That's correct as well! I recommend using two recursion methods (since mergesort and quicksort also use two recursion methods). I took a course on only recursion and I find that using the one recursion method takes longer to write. But also it doesn't matter if you use one or two. I prefer to use two though :)

  • @user-ej3oi1dp3p
    @user-ej3oi1dp3p18 күн бұрын

    @@QuocDatPhungcool! so what would you do if there are 100 thousand items in your list? ur stack will blow right

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    @@user-ej3oi1dp3p That's why I recommend using the iterative method whenever possible. The recursion is just for practice/challenge.

  • @gandorffromnorfolk
    @gandorffromnorfolk18 күн бұрын

    Dude, first of all, great proof! Second of all, what are you using to write down these proofs?

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    Thanks a lot Gandor! I write using the Wacom Tablet ctl 490. If you enjoy my calculus videos, please kindly subscribe and share with your classmates, and also you can find all of my Calculus videos here: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @gandorffromnorfolk
    @gandorffromnorfolk18 күн бұрын

    @@QuocDatPhung Thank you so much!

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    @@gandorffromnorfolk No worries! I also use the Shotcut on desktop for editing, OBS for screen recording, and Sketchbook app for drawing :) Hope that helps!

  • @gandorffromnorfolk
    @gandorffromnorfolk18 күн бұрын

    @@QuocDatPhung Thanks a lot! I'll consider using the Sketchbook app (btw I love your calculus vids)

  • @antonpoon9728
    @antonpoon972818 күн бұрын

    great video, very well explained!

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    Thanks Anton! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @calculus988
    @calculus98818 күн бұрын

    This is quality proof! Thank you. Ellipses are very interesting. You should do the proof of binomial theorem or a proof on the power rule in calculus using the binomial theorem. You're the GOAT Quoc Dat Phung!❤

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    Thank you for your support and suggestions!

  • @Entroprox
    @Entroprox19 күн бұрын

    Thanks

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    You're very welcome Entro! Please kindly share with your friends and subscribe to support me ~ also you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @Entroprox
    @Entroprox18 күн бұрын

    @@QuocDatPhung Done!

  • @gadithya4447
    @gadithya444719 күн бұрын

    could u share what tool you are using?

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    Hi Gadithya! I use wacom tablet ctl 490 to write. I also use the Sketchbook app, OBS to record the screen, and Shotcut for editing. I hope that helps! Please kindly subscribe and share my videos it means a lot!

  • @thegreen7865
    @thegreen786520 күн бұрын

    very simple, thanks

  • @QuocDatPhung
    @QuocDatPhung18 күн бұрын

    You're very welcome Green! Please kindly subscribe if you enjoyed, it means a lot!

  • @thegreen7865
    @thegreen786512 күн бұрын

    Thank you, subscribed

  • @FaberLSH
    @FaberLSH20 күн бұрын

    Thank you so much!

  • @QuocDatPhung
    @QuocDatPhung20 күн бұрын

    Thank you Faber! Please kindly share with your friends and subscribe to support me ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @0xrameshpoudel
    @0xrameshpoudel20 күн бұрын

    Niceeee.... Subscribed!

  • @QuocDatPhung
    @QuocDatPhung20 күн бұрын

    Thank you! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @anchetathemegatronmegalodon
    @anchetathemegatronmegalodon20 күн бұрын

    i love you

  • @QuocDatPhung
    @QuocDatPhung20 күн бұрын

    Thanks haha! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @mrmansir3734
    @mrmansir373421 күн бұрын

    very well made videos. I liked your improper integral video too

  • @QuocDatPhung
    @QuocDatPhung20 күн бұрын

    Thanks Mr.Mansir! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @JacobChencha
    @JacobChencha21 күн бұрын

    That was a beautiful explanation!

  • @QuocDatPhung
    @QuocDatPhung21 күн бұрын

    Thank you Jacob! Please kindly share with your friends and subscribe to support me ~ you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @ConorLambert
    @ConorLambert22 күн бұрын

    Absolute best video on Quicksort. I was looking at other vids from people with millions of subscribers and nowhere near as good as this. Thank you my good friend.

  • @QuocDatPhung
    @QuocDatPhung22 күн бұрын

    Thank you for your kind words Conor! Please kindly share with your friends and subscribe to support me ~ also you can find all of my CS videos in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @ArlenGriswold
    @ArlenGriswold24 күн бұрын

    legend

  • @QuocDatPhung
    @QuocDatPhung22 күн бұрын

    Thanks Arlen! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @subornaakter8309
    @subornaakter830924 күн бұрын

    Finally I got the concept after struggling several times

  • @QuocDatPhung
    @QuocDatPhung24 күн бұрын

    Thanks Subornaakter! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @Danizeera
    @Danizeera24 күн бұрын

    I never seen before an explanation like that!! Great video!!! Hugs from Brazil too

  • @QuocDatPhung
    @QuocDatPhung24 күн бұрын

    Thanks Danizeera! Please don't forget to share with your classmates and kindly subscribe ~ you can find all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA

  • @Martin-hi7wx
    @Martin-hi7wx25 күн бұрын

    Great. So no need for using axes x, y and z.?

  • @QuocDatPhung
    @QuocDatPhung24 күн бұрын

    For this one, no :)

  • @shuyao5248
    @shuyao524825 күн бұрын

    finally well understand. Thank you very much

  • @QuocDatPhung
    @QuocDatPhung25 күн бұрын

    Thank you for your kind words Shuyao! Please kindly share with your friends and subscribe ~ all of my CS videos are in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @xxd0164
    @xxd016425 күн бұрын

    Great video, excellent explanation, made everything very clear! hugs from Brazil

  • @Danizeera
    @Danizeera24 күн бұрын

    Do Brasil também, oh coincidência! 🤣🤣🤣

  • @christophermayfield6043
    @christophermayfield604325 күн бұрын

    thank you so much Quoc love you bro!

  • @BUY_YOUTUB_VIEWS.304
    @BUY_YOUTUB_VIEWS.30425 күн бұрын

    You make learning entertaining

  • @rylanwhitworth4641
    @rylanwhitworth464127 күн бұрын

    all these problems are just copied and pasted from blackpenredpens channel. at least change the numbers

  • @QuocDatPhung
    @QuocDatPhung27 күн бұрын

    I took these problems from the textbook "Early Transcendentals - 9th Edition" by James Steward. It's a famous textbook used by many teachers and professors.

  • @kingofcontrollers7166
    @kingofcontrollers716629 күн бұрын

    👍

  • @48_subhambanerjee22
    @48_subhambanerjee2229 күн бұрын

    Cool 😎😎❤.. good video.

  • @QuocDatPhung
    @QuocDatPhung29 күн бұрын

    Thank you for your kind words Subhambanerjee! Please kindly share and subscribe~ all of my CS videos are in this link: kzread.info/head/PLeTO6OT3-FKmuxOu4RtupTay1yrMp6QGC

  • @AnonymousAdeptt
    @AnonymousAdepttАй бұрын

    I go to uoft and you explain sooo well bro

  • @QuocDatPhung
    @QuocDatPhung29 күн бұрын

    Thanks AnonymousAdeptt! I go to UOttawa :) Please don't forget to share with your classmates and kindly subscribe ~ all of my Calculus II videos in this link: kzread.info/head/PLeTO6OT3-FKmuCeO97iKt_Aibx-a938JA