Find the points of intersection of the graphs of the equations. (Enter (0, 0) for the pole.)r = 8 + 8 cos(๐)r = 8 โ 8 sin(๐)r โฅ 0, 0 โค ๐ < 2๐
Question
Find the points of intersection of the graphs of the equations. (Enter (0, 0) for the pole.)r = 8 + 8 cos(๐)r = 8 โ 8 sin(๐)r โฅ 0, 0 โค ๐ < 2๐
Solution
To find the points of intersection of the two polar equations, we need to set them equal to each other and solve for ๐.
So, we have:
8 + 8 cos(๐) = 8 - 8 sin(๐)
Rearranging the equation gives:
8 cos(๐) + 8 sin(๐) = 0
Dividing by 8:
cos(๐) + sin(๐) = 0
This equation is satisfied when ๐ = 3๐/4 and ๐ = 7๐/4.
Substituting ๐ = 3๐/4 into the first equation gives:
r = 8 + 8 cos(3๐/4) = 8 - 8 sqrt(2)/2 = 8 - 4 sqrt(2)
Substituting ๐ = 7๐/4 into the first equation gives:
r = 8 + 8 cos(7๐/4) = 8 + 8 sqrt(2)/2 = 8 + 4 sqrt(2)
So, the points of intersection are (8 - 4 sqrt(2), 3๐/4) and (8 + 4 sqrt(2), 7๐/4).
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