Question

here is the question please answer it quickly ​

Answer 1

Answer:

$(4) \frac{ \cos( \alpha ) }{ \sin( \alpha ) } \ + \frac{ \sin( \alpha ) }{ \cos( \alpha ) } = \frac{ { \sin }^ {2} \alpha + { \cos }^{2} \alpha }{ \sin \alpha \cos \alpha } \\ = \frac{1}{ \sin \alpha } . \frac{1}{ \cos \alpha } = \sec \alpha. \csc\alpha$