Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

Calculus problem

19-09-2014 09:38PM

#1

LumberJack71

Registered Users, Registered Users 2 Posts: 5 ✭

Join Date: March 2014

Posts: 0

If I have dy/dx=5xcos(x^2) and x=1(measured in radians) do I have to put x=1 5(1) in radians and cos(1^2) in degrees to get the slope of the line?

0

Comments

#2 19-09-2014 10:07PM

TheBody

Registered Users, Registered Users 2 Posts: 5,671 ✭✭✭

Join Date: January 2011

Posts: 5535

If x=1 is measured in radians then you should use radians to find the [latex]\cos(x^2)[/latex] bit too.

0
#3 21-09-2014 12:24PM

bnt

Registered Users, Registered Users 2 Posts: 13,228 ✭✭✭✭

Join Date: April 2008

Posts: 12888

As long as you're doing Calculus, stick with Radians - that's the only way the relations work. There's a decent explanation of the reasons here.

In its pure form, fascism is the sum total of all irrational reactions of the average human character.
― Wilhelm Reich

0