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Derivatives of ALL trig functions (proofs!) 

bprp calculus basics
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Derivatives of trig functions! We will go over the proofs of the derivatives of all the trigonometric functions. The good news is we just need to use the definition of derivative only one that and that is to prove the derivative of sin(x) is cos(x). Then we can use the power rule, chain rule, and also quotient rule for the other functions.
Hope this video helps! This is for both calculus 1 and calculus 2 students. If you need lots of derivative examples, then check out 100 derivatives: • 100 derivatives (every...
0:00 dear calculus students!
0:09 derivative of sin(x) by the definition
5:46 derivative of cos(x) by the co-identity and the chain rule
9:02 derivative of tan(x) by the quotient rule
11:01 derivative of cot(x) by the quotient rule
14:01 derivative of sec(x)=(cos(x))^-1 by the power and the chain rules
17:45 derivative of csc(x)=(sin(x))^-1 by the power rule and the chain rules
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29 июл 2024

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Комментарии : 38   
@jamiewilson3297
@jamiewilson3297 Год назад
This helped me so much! now instead of trying to remember all of the derivatives I can find them myself if I forget!
@Nylspider
@Nylspider 2 года назад
Honestly these are really good exercises for practicing the limit definition of a derivative
@holyshit922
@holyshit922 Год назад
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
@gewdvibes 9 месяцев назад
@@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
@ErdemtugsC Месяц назад
@@holyshit922just find your own d/dx cosx
@user-wu8yq1rb9t
@user-wu8yq1rb9t 2 года назад
I don't care it's easy or hard; because it's still Math and it's matter. Therefore I watch it.
@gatjuatwicteatriek4590
@gatjuatwicteatriek4590 Год назад
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%
@haseebkahn4811
@haseebkahn4811 2 года назад
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.
@swapnilmaurya7767
@swapnilmaurya7767 3 месяца назад
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
@vukanimakhathini4904 Год назад
Thank you for this and all the videos you've done they're really helpful
@b4u50
@b4u50 9 месяцев назад
Your love for mathematics is contagious ❤.
@jaydenlee2310
@jaydenlee2310 2 года назад
Thanks a lot man!!! Keep up this great work!
@user-zt4hf2eu6g
@user-zt4hf2eu6g 2 года назад
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
@haseebkahn4811
@haseebkahn4811 2 года назад
Thank you so much, Sir! I had to disable adblocker and log in my account to effectively show my gratitude. 😍😍❤❤
@bprpcalculusbasics
@bprpcalculusbasics 2 года назад
Thank you. You didn't have to do that but I appreciate it! : )
@user-dq5dd4ty7m
@user-dq5dd4ty7m 2 года назад
جزاك الله خيرا
@PriggarGaming
@PriggarGaming 26 дней назад
Why are you holding a pokeball so that when we faint from math you can capture us?
@zankopshtiwan1318
@zankopshtiwan1318 Год назад
You are one of the best
@calixsnts
@calixsnts 2 года назад
THANK YOU SO MUCHH SIR, YOU HELP ME A LOT ABOUT MY ASSIGNMENT
@haris7541
@haris7541 2 года назад
Brilliant❤
@llvllx
@llvllx Год назад
Thank you sir
@bhrek3271
@bhrek3271 2 года назад
this is very epic
@dalisabe62
@dalisabe62 6 месяцев назад
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.
@user-wu8yq1rb9t
@user-wu8yq1rb9t 2 года назад
When the top of your marker fell down, it remembered me the *Matrix* ; but the *Matrix movie* !
@lifewithdebathequeenslife1858
@lifewithdebathequeenslife1858 2 месяца назад
Please how does sinH give you cosH 😢, why can't i understand this 😢😢
@gdlorenzodm5664
@gdlorenzodm5664 Год назад
derivative of (no “co”)+(trig function) = doesn’t have a minus derivative of “co” + (trig function) = has a minus
@foremost6233
@foremost6233 Год назад
I love his pokemon.
@spaceshipastro
@spaceshipastro 6 месяцев назад
thankkkk u sirr
@fanamatakecick97
@fanamatakecick97 2 года назад
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
@carultch 10 месяцев назад
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.
@user-od9te5kn6i
@user-od9te5kn6i 9 месяцев назад
Bro ...how i can get the formulas written on your shirt..in pdf form..?
@user-klepikovmd
@user-klepikovmd Год назад
This -1 thing is too confusing. Our calculus teacher taught us to never use it and write arc instead
@lumina_
@lumina_ 10 месяцев назад
there shouldn't be any ambiguity if you write it as (cos(x))^(-1)
@user-klepikovmd
@user-klepikovmd 10 месяцев назад
@@lumina_ too complicated
@lumina_
@lumina_ 10 месяцев назад
@@user-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
@thexoxob9448 9 дней назад
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?
@CoolCatDoingAKickflip
@CoolCatDoingAKickflip 8 месяцев назад
Haha secx
@suhaniverma6583
@suhaniverma6583 2 месяца назад
Please suggest AP calc books for Indian students'
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