Take the derivative of a trigonometric function

[@theoneafterthelast]

I don't comment very much on youtube videos but you have been amazing for me during the COVID-19 quarantine. Thank you for your expertise sir.

[@lllyyyy4310]

Did you mean the product rule? I was a bit confused

[@ninacoli2770]

Yah it was supposed to be product rule.

[@Alipuree]

thank you

[@lllyyyy4310]

Thx