Question

Without using trigonometric tables, evaluate:
$\sec {58}^o\sin {32}^o$
$\cos {38}^o\cos ec{52}^o$

Answer 1

$\sec 58\sin 32\frac{1}{\cos 58}\cos (90-32)\frac{\cos 58}{\cos 58}=1$

$\cos 38\csc 52\sin (90-38)\frac{1}{\sin 52}\frac{\sin 52}{\sin 52}=1$