Final answer:
To simplify 1/cos(x) + 1/cos(x) - 1, combine the fractions with a common denominator and simplify the expression to (2 - cos(x))/cos(x).
Step-by-step explanation:
To simplify the expression 1/cos(x) + 1/cos(x) - 1, we can combine the two fractions with a common denominator. The common denominator is cos(x), so we have:
(1 + 1 - cos(x))/cos(x)
This simplifies to:
(2 - cos(x))/cos(x)