2007
Mathematics
67ca00ce0c643c71d77dee1f
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
Correct Answer: cos x - x sin x
Explanation
y = x cos x dy/dx = 1. cos x + x (-sin x) = cos x - x sin x
y = x cos x dy/dx = 1. cos x + x (-sin x) = cos x - x sin xTHIS WEEK's
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