Polar area
The polar curve r=2cos(theta) traces a circle for -pi/2<=theta<=pi/2. Area = (1/2) integral r^2 dtheta.
- Square r.
- Use the full tracing interval.
- cos^2 has average 1/2 over length pi.
parametric, polar, and vector representations
The polar curve r=2cos(theta) traces a circle for -pi/2<=theta<=pi/2. Area = (1/2) integral r^2 dtheta.
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