FP2 Polar Coordinates Help!
How do you know which limits to use when finding areas for polar coordinates??
Original post by V0ldemort17
How do you know which limits to use when finding areas for polar coordinates??
Give a specific example.
How do you know which limits to integrate between to get areas?
Posted from TSR Mobile
Posted from TSR Mobile
Original post by V0ldemort17
I draw half lines from the pole, until they meet my curve, like a "shell" pattern.
Then I can see ...
Original post by V0ldemort17
How do you know those limits are pi/6 and-pi/6?
It would help if we knew the equation of the curve
Original post by V0ldemort17
You mean , I guess.
To find the angles in question, you know that when the curve reaches back to the origin, then
So solve that equation for +ve and -ve theta.
Original post by V0ldemort17
Right, as per atsrusers update you want r = cos(3theta) and presumably you're trying to find the limits for the right-hand loop, which is bounded by the points where r = 0 so you're solving cos(3theta) = 0. So clearly theta = -pi/6 or pi/6.
(edited 9 years ago)
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