Plzz!!!! maths help?

Question

how to solve these? 

1. prove that : [ tan(x) +sec(x) - 1 ] / [ tan(x) - sec(x) +1] 

= 1 + sin (x) / cos(x)

Answer 1

Left hand side identity

Multiple to numarator and denominator by

Apply the formula

Apply the formula

From the pythagorean identity

 

 

= Right hand side identity