If y x cosx find frac dy dx - JAMB Mathematics 2007 Question
If y = x cosx, find \(\frac{dy}{dx}\).
A
cos x - x sinx
B
sinx - x cosx
C
sin x + x cosx
D
cosx + x sin x
correct option: a
If y = x cosx, find \(\frac{dy}{dx}\).
Using product rule \(\frac{dy}{dx}\) = cosx - x sinx
Using product rule \(\frac{dy}{dx}\) = cosx - x sinx
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