Derivatives of ALL trig functions (proofs!)

[@jamiewilson3297]

This helped me so much! now instead of trying to remember all of the derivatives I can find them myself if I forget!

[@gatjuatwicteatriek4590]

This man qualifies to take all the students in the world. I will not get tired of sharing your videos, they are really helping 100%

[@Nylspider]

Honestly these are really good exercises for practicing the limit definition of a derivative

[@holyshit922]

But he used it only for sine , moreover he didnt explain why limit ((cos(h)-1)/h ,h=0)= 0 so even this derivative is incomplete BTW it is easy to express the derivative of sine using limit (sin(h)/h,h=0) only

[@gewdvibes]

@@holyshit922he said that proof is out of scope of this video and he also said you can just use your calculator to figure out the proof as h approaches 0

[@ErdemtugsC]

@@holyshit922just find your own d/dx cosx

[@PriggarGaming]

Why are you holding a pokeball so that when we faint from math you can capture us?

[@user-wu8yq1rb9t]

I don't care it's easy or hard; because it's still Math and it's matter. Therefore I watch it.

[@haseebkahn4811]

13:32 I think we have negative sign in the derivatives because in the complimentary angles, we have a negative sign with x ie. {[Pie/2] -x} and d(-x)/dx= -1.

[@b4u50]

Your love for mathematics is contagious ❤.

[@munchaitea2330]

your video is amazing😭 keep doing it i finallly understand why the derivatives of trig is like that thank you

[@haseebkahn4811]

Thank you so much, Sir! I had to disable adblocker and log in my account to effectively show my gratitude. 😍😍❤❤

[@bprpcalculusbasics]

Thank you. You didn't have to do that but I appreciate it! : )

[@ΑΝΤΩΝΗΣΠΑΠΑΔΟΠΟΥΛΟΣ-ρ4τ]

I love your videos. Btw, when u calculated cotx, by writing it as cosx/sinx, i calculated it by typing it as 1/tanx instead

[@swapnilmaurya7767]

In calculating of the derivative of sinx we can also use the sin c - sind= 2 cos((c+d)/2)*sin((c-d)/2)

[@vukanimakhathini4904]

Thank you for this and all the videos you've done they're really helpful

[@AaronBoone-x6c]

Bro you have a wicked beard. I could watch you do math ALL DAY, EVERYDAY. I want to be this intuitive at math, but with all the geometric theory. I want to be like Euler. Alas, we will never have another Euler. Maybe you can be our Euler?

[@dalisabe62]

The trouble doesn’t end without having to prove the last steps. lim sin(h)/h as h goes to zero needs proof and using the calculator is not a proof. Likewise the other lim that has the cosine term needs proof as well. Other than that, the methodology of the proof looks good.

[@ضحىطارق-ب4ذ]

جزاك الله خيرا

[@jaydenlee2310]

Thanks a lot man!!! Keep up this great work!

[@shivanshumaurya_]

Thank You So Much 🙏

[@zankopshtiwan1318]

You are one of the best

[@gdlorenzodm5664]

derivative of (no “co”)+(trig function) = doesn’t have a minus derivative of “co” + (trig function) = has a minus

[@Feed_frenzy8]

THANK YOU SO MUCHH SIR, YOU HELP ME A LOT ABOUT MY ASSIGNMENT

[@user-wu8yq1rb9t]

When the top of your marker fell down, it remembered me the *Matrix* ; but the *Matrix movie* !

[@haris7541]

Brilliant❤

[@fanamatakecick97]

Doesn’t Chen Lu take place no matter what, technically? d/dx (x) = 1, it would be d/dx (sinx) = cosx * 1, which is just cosx Just food for thought

[@carultch]

Yes, it's just a trivial case of Mr Chen Lu, since multiplying by 1 is a trivial case that leaves the rest of the expression alone.

[@llvllx]

Thank you sir

[@bhrek3271]

this is very epic

[@lifewithdebathequeenslife1858]

Please how does sinH give you cosH 😢, why can't i understand this 😢😢

[@foremost6233]

I love his pokemon.

[@AliAown-z2d]

Bro ...how i can get the formulas written on your shirt..in pdf form..?

[@klepikovmd]

This -1 thing is too confusing. Our calculus teacher taught us to never use it and write arc instead

[@lumina_]

there shouldn't be any ambiguity if you write it as (cos(x))^(-1)

[@klepikovmd]

@@lumina_ too complicated

[@lumina_]

@@klepikovmd how lol, it's just an exponent of -1 clearly written edit: oh wait you're referring to when you write inverse cosine, nevermind. I do agree that arccos(x) is probably better

[@thexoxob9448]

Inverse trig aside, I think cos²(x) should be cos(cos(x)). You literally can already write cosine squared as cos(x)² or (cos x)². Why make a new notation for something that already has a notation just as simple?

[@spaceshipastro]

thankkkk u sirr

[@CoolCatDoingAKickflip]

Haha secx

[@suhaniverma6583]

Please suggest AP calc books for Indian students'