Question

plzz.. solve it
step by step​

Answer 1

Answer:

inki values nhi di hai kya

Answer 2

Step-by-step explanation:

$\frac{ \sec( \alpha ) - 1 }{ \sec( \alpha ) + 1 }$

$= \frac{ \frac{1}{ \cos( \alpha ) } - 1 }{ \frac{1}{ \cos( \alpha )} + 1 }$

$= \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) }$

$= \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) } \times \frac{1 + \cos( \alpha ) }{1 + \cos( \alpha ) }$

$= \frac{1 - ( { \cos( \alpha )) }^{2} }{ {(1 + \cos( \alpha )) }^{2} }$

$= {( \frac{ \sin( \alpha ) }{1 + \cos( \alpha ) } })^{2}$