The problem statement, all variables and given/known data Find area of regions bounded by x^2 + y^2 = 9, y = 2x, x-axis in the first quadrant The attempt at a solution So, i drew the graph of y against x in my copybook, and circle with origin (0,0), radius = 3 units. The line y = 2x cuts through the circle. Transforming to polar coordinates, the new limits are: 0≤θ≤tan^-1(3) and 0≤r≤3 [tex]\int\int rdrd\theta[/tex] After integration, i get the final answer: (9/2)tan^-1(3) However, the answer in my notes is: (9/2)tan^-1(2). Did i copy the wrong answer or is my work wrong? I'm not sure.