Free account: track your progress — Sign up free

JAMB Mathematics 2007 Objective — Question 36

Question 36 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

If y=x.cos(x), find dy/dx.

A. cos(x)+x.sin(x)
B. cos(x)-x.sin(x)Correct
C. sin(x)-x.cos(x)
D. sin(x)+x.cos(x)

Explanation

Using the product rule: dy/dx = x(-sin x) + cos(x)(1) = cos(x) - x.sin(x).

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Mathematics 2007 Objective More Mathematics past papers