Find the points of intersection of the graphs of the equations. (Enter (0, 0) for the pole.)r = 𝜃3r = 3
Question
Find the points of intersection of the graphs of the equations. (Enter (0, 0) for the pole.)r = 𝜃3r = 3
Solution
The given equations are in polar coordinates. The first equation is r = 𝜃/3 and the second equation is r = 3.
To find the points of intersection, we set the two equations equal to each other and solve for 𝜃:
𝜃/3 = 3 𝜃 = 9
Substitute 𝜃 = 9 into the first equation to find r:
r = 9/3 = 3
So, the point of intersection in polar coordinates is (r, 𝜃) = (3, 9).
However, the question asks for the intersection points in Cartesian coordinates. To convert from polar to Cartesian coordinates, we use the formulas x = rcos𝜃 and y = rsin𝜃.
Substituting r = 3 and 𝜃 = 9 into these formulas, we get:
x = 3cos(9) y = 3sin(9)
So, the point of intersection in Cartesian coordinates is approximately (x, y) = (-1.879, -0.684).
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