Evaluating Integrals With Trigonometric Functions

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  • เผยแพร่เมื่อ 31 ต.ค. 2024

ความคิดเห็น • 72

  • @vex3315
    @vex3315 6 ปีที่แล้ว +87

    This is a lifesaver for me. This is actually one of the topics that I couldn't grasp a few weeks ago and this week is already our finals. I am a SHS student in the Philippines and I am frequently using your content to learn in advance or study the topics for our quizzes so I am grateful to you Sir! I hope I can help directly by giving donations but I make sure I share your videos to my classmates. Thank you!

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  6 ปีที่แล้ว +35

      Awesome! Any donations to my Patreon page are most appreciated! But failing that just tell your friends to subscribe :)

    • @shrimpjar3612
      @shrimpjar3612 ปีที่แล้ว +1

      I'm in Southern New Hampshire university and I cannot believe how much this video helped me! I couldn't understand my professor at all without this.

    • @kiransingh2225
      @kiransingh2225 4 หลายเดือนก่อน

      what are u doing now?

  • @adhel-estebanriverarodrigu2234
    @adhel-estebanriverarodrigu2234 2 ปีที่แล้ว +10

    DUDE! You seriously have a gift of teaching! I was thinking of dropping out of Calculus because I didn't understand anything, and with this video, and reviewing the video you recommended, you got me up to speed in less than a day!!! YOU ARE A LIFE SAVER!!!!
    Thank you so much for what you do!!! Keep up the great work!!!

  • @Salamanca-joro
    @Salamanca-joro 7 หลายเดือนก่อน

    Absolute legend man i watched multiple videos and you were one of the few who could explain it cause i was lost

  • @Bankosek
    @Bankosek 9 หลายเดือนก่อน +1

    I love your modern content, but those tutorials will stay relevant and great for ages.

  • @sewwandiishara9828
    @sewwandiishara9828 3 ปีที่แล้ว +7

    Thank you very much sir...(from sri lanka..)
    3month lecture in 10min.. 🙏👍👍

  • @Kiky_MedPhysicist
    @Kiky_MedPhysicist 2 หลายเดือนก่อน +1

    Thank you sir for your dedication and for making this free! 🙏

  • @anthonyvicker8033
    @anthonyvicker8033 3 ปีที่แล้ว +3

    Wow! This is really good sir. From Kenya( Africa)

  • @DBear8008
    @DBear8008 2 ปีที่แล้ว +1

    I missed the class where we talked about this stuff, and I have been singing the intro song all day in anticipation for doing my homework on this

  • @Salamanca-joro
    @Salamanca-joro 7 หลายเดือนก่อน

    5:44 or we can also say sin^2x/cos2^x which will be[ tanx] and cos^2x/cos^2x will be 1 and we will get :
    The integer tan^2x+1 which will be the integer of sec^2x which is tanx+c

  • @priyamuskan5468
    @priyamuskan5468 6 ปีที่แล้ว +11

    Thank you so much sir.

  • @ok22283
    @ok22283 2 หลายเดือนก่อน +1

    pure legend

  • @francisgregoryku1689
    @francisgregoryku1689 5 ปีที่แล้ว +17

    Chemistry physics and now calculus??? Mah mannn!

  • @aselim20.
    @aselim20. 9 หลายเดือนก่อน +1

    I watched it twice and I took notes.

  • @lalahappy6779
    @lalahappy6779 3 ปีที่แล้ว +3

    Thanks for the explanation 🌹

  • @RayanRaya-o5q
    @RayanRaya-o5q 4 หลายเดือนก่อน

    Thank you so so much 💗💗💗

  • @littleretroship6403
    @littleretroship6403 2 ปีที่แล้ว +5

    Holy cow this is hard. I can’t imagine how integration is gonna be later on

    • @NoActuallyGo-KCUF-Yourself
      @NoActuallyGo-KCUF-Yourself ปีที่แล้ว +3

      Don't worry, it gets worse.

    • @littleretroship6403
      @littleretroship6403 ปีที่แล้ว +2

      @@NoActuallyGo-KCUF-Yourself my then 13 year old brain was too stupid to handle that but now I’m a cool 14 year old so I think I should be able to handle it. (Plus I don’t have much time left on this earth since im an old man)

    • @ultimatedoug2227
      @ultimatedoug2227 ปีที่แล้ว +1

      @@littleretroship6403 damn bro you learning integration at 14? bruh i wish i hadnt wasted my time doing BS. ill use this as an insipiration and work more

  • @PreciousEkpenyong-wq2zw
    @PreciousEkpenyong-wq2zw ปีที่แล้ว

    Thanks a lot, I really understood 🙏

  • @cassandraguzman2316
    @cassandraguzman2316 3 ปีที่แล้ว

    thank you

  • @AbdUllahKhan-kx6en
    @AbdUllahKhan-kx6en 5 ปีที่แล้ว +7

    It's easy to understand 👌

  • @sophieroot6657
    @sophieroot6657 3 ปีที่แล้ว

    THANK YOU KING

  • @nayanpatel312
    @nayanpatel312 3 ปีที่แล้ว

    Simply, Awsm

  • @mc2092
    @mc2092 4 ปีที่แล้ว +1

    Need more videos 😭🥺🙏

  • @tturkuaz
    @tturkuaz 7 หลายเดือนก่อน

    Probably ı will pass the class with you

  • @alyrainnee4939
    @alyrainnee4939 9 หลายเดือนก่อน

    tysm!!!!

  • @zorozoro1442
    @zorozoro1442 2 ปีที่แล้ว +1

    perfect!

  • @kaihsu_angels
    @kaihsu_angels 5 ปีที่แล้ว +1

    Just subscribed 😊

  • @tGoldenPhoenix
    @tGoldenPhoenix 2 ปีที่แล้ว

    Done.

  • @furejul7619
    @furejul7619 3 ปีที่แล้ว

    you teach great and i understand.but you dont teach all the trigonometry identities making me hard to relate in in your question

  • @topiado2073
    @topiado2073 5 ปีที่แล้ว +4

    Sir would the rule of questient and multiple hold in definite integral??? Plizz...

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 ปีที่แล้ว +1

      Sorry I’m not sure what you mean.

    • @topiado2073
      @topiado2073 5 ปีที่แล้ว +1

      sir will product and quotient rule be applied to definite integral..,?? Well as u mentioned that for indefinite integral there's no product and quotient rule as compare to that of derivative has... Hope u gotta point sir🙂

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 ปีที่แล้ว +2

      no, integration has no such rules, which is why it's more difficult, check out my other tutorials on u substitution, integration by parts, trig substitution, these are the techniques we use when integrating.

    • @topiado2073
      @topiado2073 5 ปีที่แล้ว +1

      @@ProfessorDaveExplainssir may i hv ur contact no,...so that i could ask u problem regarding calculus sometimes🙂plizz sir

    • @BenGoroshnik
      @BenGoroshnik 3 ปีที่แล้ว

      @@topiado2073 wtf

  • @rjf5790
    @rjf5790 4 ปีที่แล้ว +2

    can we prove this using the U-substitution?

    • @NoActuallyGo-KCUF-Yourself
      @NoActuallyGo-KCUF-Yourself ปีที่แล้ว

      Not a proof, but you could probably use that as an alternate method to evaluate.

  • @vashman01
    @vashman01 2 ปีที่แล้ว

    What to do when evaluating trig functions with respect to y? Evaluate the integral of tanxdy from 0 to 7? What about sinxdy from 0 to 7?

    • @multiplyx5864
      @multiplyx5864 2 ปีที่แล้ว

      those are definite integrals. There is a separate video on that

    • @NoActuallyGo-KCUF-Yourself
      @NoActuallyGo-KCUF-Yourself ปีที่แล้ว

      If the variable of integration is y, any functions of x are treated as constants.

    • @An_ony_mous
      @An_ony_mous ปีที่แล้ว

      The answer is 7sinx and 7tanx. sinx and tanx are constants because given variable is y.

  • @Baburun-Sama
    @Baburun-Sama 2 ปีที่แล้ว +2

    "Sine! Cosine! Tangent! Integral! Permutation!" - Ringo Ando

  • @lazyonigiri5665
    @lazyonigiri5665 3 ปีที่แล้ว

    thankyouuuu

  • @satbirsingh7269
    @satbirsingh7269 6 ปีที่แล้ว +2

    Hello sir! How r u???!!

  • @TheFirstNamelessOne
    @TheFirstNamelessOne 4 ปีที่แล้ว +6

    Sir, could you give me the reason of this? Why do these trigonometric functions behave like this when integrated?

    • @kbailkeri
      @kbailkeri 4 ปีที่แล้ว +1

      He already explained them in this video,
      th-cam.com/video/_Zqcxbjzyxg/w-d-xo.html

    • @NoActuallyGo-KCUF-Yourself
      @NoActuallyGo-KCUF-Yourself ปีที่แล้ว

      What do you mean by "why"? The reason is that is what happens when you perform the operations.

    • @kzkaa.
      @kzkaa. 5 หลายเดือนก่อน

      Ignore the other guy. This is actually a very good question, and it has something to do with what you're really doing when you integrate a function. As you probably already know, integration is all about finding the area of a function. One way to think of it is that whenever an antiderivative goes up, then the area underneath its corresponding derivative also goes up and vice versa.
      Of course, I'm no experts, so you'd have to verify it yourself.

    • @henrygalvan9333
      @henrygalvan9333 4 หลายเดือนก่อน

      You think it helps to uderstand whats happening graphically? M ​@kzkaa.

  • @aradan4955
    @aradan4955 4 ปีที่แล้ว +5

    You didn’t do tan

  • @smookytubes
    @smookytubes 2 ปีที่แล้ว +2

    Can you do some problems using u substitution with trig integrals?

    • @biphysimath-special3231
      @biphysimath-special3231 2 ปีที่แล้ว

      Happy to inform You that a new video has been uploaded
      th-cam.com/video/HHuiSetD-6w/w-d-xo.html Please have a look

  • @obaidaljabry3899
    @obaidaljabry3899 3 ปีที่แล้ว

    how to integrate sin2x/(1+cons^2)

  • @atchuk9045
    @atchuk9045 6 ปีที่แล้ว

    Nice

  • @taliyamurad8208
    @taliyamurad8208 3 ปีที่แล้ว

    I Like it 😍

  • @mscience8806
    @mscience8806 6 ปีที่แล้ว +5

    Math is CRACK to me !,, thank you!,,,!,

  • @VaryprshotOfficial
    @VaryprshotOfficial 3 ปีที่แล้ว +2

    thank you jesus!

  • @kiven6890
    @kiven6890 2 ปีที่แล้ว

    You shed what you write we can't see

    • @CalviNsiku
      @CalviNsiku 4 หลายเดือนก่อน

      Dont say we...say i cant see.....

  • @ambervancott3486
    @ambervancott3486 6 ปีที่แล้ว +1

    ;)wink wink