Question

f(x)=xcosx-sinx thenf'(x) equal to

Answer 1

\[f'(X)=\frac{ d(xcosx) }{ dx }-\frac{ d sinx }{ dx }\]

Answer 2

=cosx(dx/dx)+x(d cosx/dx)-dsinx/dx

Answer 3

i think you mean product rule, not chain rule here