Answer:
Let y = xsinx
+ (sin x)cos x
?. (1)
where A = xsinx
Diff. w.r.t. x
and B = (sin x)cos
x
Diff. w.r.t.x
[cos x cotx
?sin x log (sin x)]
= (sinx)cos
x [cos x cot x ? sin x log sin x]
(i) 
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