Question

d(x sin x + cos x)/dy

Answer 1

$\textbf{Answer :}$

Now,

d (x sinx + cosx)

= d (x sinx) + d (cosx)

= x d (sinx) + sinx dx - sinx dx

= x cosx dx - sinx dx - sinx dx

= x cosx dx - 2 sinx dx

= (x cosx - 2 sinx) dx

So, d (x sinx + cosx)/dy

= (x cosx - 2 sinx) dx/dy

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