Question

Evaluate $\frac{\sin {65}^o}{\cos {25}^o}$

Answer 1

We know,
$\cos {25}^o=\sin ({90}^o-{25}^o)=\sin {65}^o$
$\therefore \frac{\sin {65}^o}{\cos {25}^o}=\frac{\cos {25}^o}{\cos {25}^o}=1$