Question

Pls solve this ...........

Answer 1

Here is your answer in the attachment above

Answer 2

$sina + \frac{1}{sina} = 3 \\ ({sina + \frac{1}{sina} )}^{2} = {sin}^{2}a + 2sina \times \frac{1}{sina} + ({ \frac{1}{sina} })^{2}$

$9 = {sina}^{2} + \: \frac{1}{ {sin}^{2}a} + 2 \\ 7 = {sin}^{2}a + \frac{1}{ {sin}^{2}a }$

All the best