If cosec^2a(1+cosa) (1-cosa)=x then the value of x is

Solution:{cosec^2(a)}{1+cos(a)}{1-cos(a)}={1÷sin^2(a)}{1-cos^2(a)}={1÷sin^2(a)}{sin^2(a)}=1Hence x=1 If answer is correct please click on approved.