**Find a Cartesian equation for the curve and identify it.**

**r2 cos2θ=1?**

**Answer:**

Consider the polar equation,

Need to convert this equation into Cartesian equation.

Let the rectangular coordinates be (x, y).

The polar coordinates is defined as

**Find a Cartesian equation for the curve and identify it.**

**r2 cos2θ=1?**

**Answer:**

Consider the polar equation,

Need to convert this equation into Cartesian equation.

Let the rectangular coordinates be (x, y).

The polar coordinates is defined as