Question

please answer anyone​

Answer 1

Answer:

7sin -9cos=00000000000000000000000000000

Answer 2

$\sqrt{ \frac{1 - cosA}{1 + cosA} } + \sqrt{ \frac{1 + cosA}{1 - cosA} } \\ \\ = \frac{ \sqrt{1 - cosA} }{ \sqrt{1 + cosA} } + \frac{ \sqrt{1 + cosA} }{ \sqrt{1 - cosA} } \\ \\ = \frac{1 - cosA + 1 + cosA}{ \sqrt{1 - {cos}^{2}A } } \\ \\ = \frac{2}{sinA} \\ \\ = 2cosecA$