57/sin(-27pi/4)cos(25pi/4)

sin(-27pi/4)=sin(-3pi/4)=-sin(3pi/4)=-[latex] \sqrt{2}/2 [/latex] cos(25pi/4)=cos(pi/4)=[latex] \sqrt{2}/2 [/latex] 57÷(-[latex] \sqrt{2}/2 [/latex]*[latex] \sqrt{2}/2 [/latex])=-104