Answer:
- x = 6
- the graph is a vertical line
Explanation:
The usual relation between polar and rectangular coordinates is ...
x = rcos(θ)
Using the relationship between cosine and secant, we can rewrite this as ...
r = x/cos(θ) = x·sec(θ)
Matching this with your given equation, ...
r = 6·sec(θ)
we see that ...
x = 6
This is the equation of a vertical line.