tanx/cotx)*cotx + tanx*sinx*cot^2xsecx + tanx*sinx*cot^2xsecx for x=pi/4
let us omit the 1 st term so the remaining term each term will be equal to one so 2 times tanx*sinx*cot^2xsec=2 so answer is 3 since tanpi/4=1