Calculus - Derivative of sin and cos

[@lucy.2087]

What a legend. I didn't understand any of this and have watched so many KZbin videos but they all failed to explain it to me. Thank you.

[@rafaellapolo]

Thank you so much! God bless your soul

[@alexmejia2670]

you made my day, I mean my calc 1 test. thank u

[@cosmasmwamwembe3409]

I really found the video helpful.....I literally had no idea about the topic. Thank you

[@madelynnmvillanueva988]

WOW, I understood it a lot more! thank you!

[@theintrastellar]

Gotta admit. This was pretty f-ing cool. Thank you!

[@patricksalu7817]

You Sir are a legend. Thank you so much.

[@soniamahey7203]

Superb 👏

[@ashleyvito6721]

omg i love you so much THANK U I LOVE U WITH MY WHOLE HEART THIS MAKES SO MUCH SENSE I LOVE U

[@Primitive_Code]

Ashley Vito lol.

[@dr.navaro99]

Thank you God bless you ❤

[@Rookblunder]

Excellent , thanks, clear and helpful

[@beverlybeepath2807]

Very good explanation.

[@michael-vuolo]

do you have a video about the trigonometric addition/division/etc? how do we know cos(x)^2 + sin(x)^2 = 1? and how do we know 1/cos(x)^2 = sec(x)^2? Thank you! Great work on these videos. I actually like Calculus now... 😂

[@visakhn2366]

UR THE GOD OF CALCULUS

[@أبوعبدالملك-ش9ج]

Good explain

[@teawithtia_]

Sir please do some more q. Realated to this please it helps alot

[@abdinorkamaaro1933]

Thanks I am understand as well as

[@armandoaguilar5811]

thank you so much

[@mehrosenasir4942]

what would be a derivative of cos(cot 2x^2+3x). Here we can simply apply the product formula but what is the angle of the cos in the given equation?

[@abdulrahmanlingga9438]

Hi Sir, how would you know when to use the product rule in *numbers*sin/cos/etc(x)?

[@Frederick-sg2dc]

Thank goodness

[@faxrijafarov6095]

Oh my God , thanks a lot

[@BC-2]

There's one proof in math that I'd absolutely love to see....the practical, on the job, no bs, use for this.

[@aritora778]

what would i do in maths without youtube???

[@TonyTorzido]

daddy