Question

$\frac{{cos}^2{20}^{\circ }+{cos}^2{70}^{\circ }}{{sin}^2{31}^{\circ +}+{sin}^2{59}^{\circ }}+{sin}^2{64}^{\circ }+cos{64}^{\circ }sin{26}^{\circ }$

Answer 1

$\frac{{\cos }^2{20}^o+{\cos }^2{70}^o}{{\sin }^2{31}^o+{\sin }^2{59}^o}+{\sin }^2{64}^o+{\cos }^2{64}^o{\sin }^2{26}^o$

$\frac{{\sin }^2{70}^o+{\cos }^2{70}^o}{{\sin }^2{31}^o+{\cos }^2{31}^o}+{\sin }^2{64}^o+{\cos }^2{64}^o$

$1+1=2$