Differentiate sin x – x cos x
- x cos x
-
x sin x
- -x cos x
- -x sin x
The correct answer is: B
Explanation
sin x - x cos x
dy/dx = cos x - [1.cos x + x -sin x]
= co x - [cos x - x sin x]
= cos x - cos x + x sin x
= x sin x
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