Find the slope of the line tangent to the following polar curve at the given points. r=9+6cosθ;(3,π) and (15,0) Find the slope of the line tangent to r=9+6cosθ at (3,π). Select the correct cho A. The slope is (Type an exact answer.) B. The slope is undefined. Find the slope of the line tangent to r=9+6cosθ at (15,0). Select the correct ch A. The slope is (Type an exact answer.) B. The slope is undefined.