Choose the correct options from the given alternatives : int (x- sinx)/(1 - cosx)*dx =

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- x cot (x/2) + c [ Hint : `int (x- sinx)/(1 - cosx)*dx = int (x - 2sin(x/2)cos(x/2))/(2sin^2 (x/2))*dx = (1)/(2) int x"cosec"^2(x/2)*dx - int cot(x/2)*dx = (1)/(2) [x int "cosec"^2 (x/2)*dx - int [d/dx(x) int "cosec"^2(x/2)^(dx)]*dx - int cot(x/2)*dx = (1)/(2)[x{(-cot(x/2))/(($\frac{1}{2}$))} - int1* (-cot(x/2))/(($\frac{1}{2}$))*dx - intcot(x/2)*dx = xcot(x/2) + int cot(x/2)*dx - int cot(x/2)*dx = - x cot(x/2) + c`].

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