Question

evaluate sin 20°/cos 70°​

Answer 1

Solution :

$\frac{ \sin(20°) }{ \cos(70°) }$

$\frac{ \sin(90° - 70°) }{ \cos(70°) }$

We know that,

sin(90-∅)=cos∅

$\frac{ \cos(70°) }{ \cos(70°) } = 1$