If cosθ=45 find the value of secθ-1secθ+1?

If $\cos θ = \frac{4}{5}$ find the value of $\frac{s e c θ - 1}{s e c θ + 1} ?$

Matching exercise

Match the items on the right to the items on the left.

Step - 1

Step - 2

Step - 3

Step - 4