Identify the expression that is equivalent to cot x/ csc x -1

Cotx = cosx/sinx
cscx = 1/sinx

If we plug these into your equation we get:
(cosx/sinx)/(1/sinx) - 1

Dividing by a number is the same as multiplying by its reciprocal so it can be rewritten as:
(cosx/sinx)(sinx) - 1 

The two sinx's cancel each other out so we end up with cosx - 1

And if we compare this to the general equation for a circle:

We see that the radius is and the center would be

Step-by-step explanation:

For this case we have the following equation:

We need to complete the square for x and y like this:

And simplifying we got:

And if we compare this to the general equation for a circle:

We see that the radius is and the center would be