Question 1073417
3sinx-cos2x-1/sin²x+2sinx = 2-cosec x



Is this what you really have?
{{{(3sin(x)-cos(2x)-1)/(sin^2(x)+2sin(x)) = 2-cosec(x)}}}



Possible useful identity:  {{{cos(2x)=1-2sin^2(x)}}}