Question

Question 1 (iv)
Evaluate :
$cosec{31}^{\circ }-sec{59}^{\circ }$

Answer 1

$cosec{31}^{\circ }-sec{59}^{\circ }$
$=cosec({90}^{\circ }-{59}^{\circ })-sec{59}^{\circ }$
$=sec{59}^{\circ }-sec{59}^{\circ }=0$ (As cosec (${90}^{\circ }$ - A) = sec A)