- #1

jd12345

- 256

- 2

## Homework Statement

Find the range of y = (cos

^{2}x - 1) / ( cos

^{2}x + cos x )

## Homework Equations

## The Attempt at a Solution

Well i tried the usual method. I cross multiplied and got a quadratic equation in cos x. Then it should have discriminant greater than zero so in the end i get (y-2)

^{2}> 0 which is true for all y. So range is R? ( I don't have the answer)