Question

sin35/cos55+cos55/sin35-2cos sq.60. please answer this question by step by step.

Answer 1

We know that  Sin 35° = Cos (90° - 35°) = Cos 55°
                        Cos 60° = Sin 30° = 1/2 

Given

$\frac{Sin35^o}{Cos55^o}+\frac{Cos55^o}{Sin35^o}-2Cos^2 60^o\\\\=1+1-2*(\frac{1}{2})^2\\\\=2 - \frac{1}{2}=\frac{3}{2}$