Question

How do you verify `(sec(x) - 1)/(1 - cos(x))=sec(x)`?

Answer 1

Verify: `(sec - 1)/(1 - cos) = sec`

Explanation:

`((1/cos x) - 1)/(1 - cos x) = ((1 - cos x)/cos x)/(1 - cos x) =`
`= (1 - cos x)/(cos x)(1/(1 - cos x)) = 1/cos x = sec x`