Part 1. Calculus questions

asked Dec 20, 2020 137k views

2 votes

4.6k points

Please log in or register to add a comment.

4 votes

Use the chain rule:

$(\mathrm dy)/(\mathrm dx)=(\mathrm dy)/(\mathrm du)\cdot(\mathrm du)/(\mathrm dx)$

With
$y=\cos u$ , you have
$(\mathrm dy)/(\mathrm du)=-\sin u$ .

With
u=7x^2 , you have
$(\mathrm du)/(\mathrm dx)=14x$ .

$(\mathrm dy)/(\mathrm dx)=-14x\sin u=-14x\sin(7x^2)$

Lenny Markus answered Dec 26, 2020

4.7k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.2m questions

6.8m answers