find the equation of the form sin²x+bsinxcosx+c cos²x+d=0

Dear ,

  Its a quadratic eq. of sinx like  asin²x + bsinx + c =0

Sol. of ax²+bx + c =0 is x =[-b - √b²-4ac]/2a  and [-b + √b²-4ac]/2a

So, solution is -

 sinx  = [ -bcos + √b²cos²x - 4c(cos²x + d ) ]/2  and  sinx  = [ -bcos - √b²cos²x - 4c(cos²x + d ) ]/2

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