Question 135
If $$y = x \sin x$$, then at $$x = \frac{\pi}{2}, \frac{dy}{dx} =$$
Solution
$$y = x \sin x$$, then at $$x = \frac{\pi}{2
$$y = x \sin x$$, then at $$x = \frac{180}{2}
\frac{dsin90}{dx}
1
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