If y = x cos x, find dy/dx
A
sin x - x cos x
B
sin x + x cos x
C
cos x + x sin x
D
cos x - x sin x
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
y = x cos x
dy/dx = 1. cos x + x (-sin x)
= cos x - x sin x
Source: Myschool Past Questions Archive (Record #9222)