It is the arc length s. r * θ = s this comes from the definition of radiance (rad) the angle unit. What you found was the arc length or circumference of the circle. To become the area take the integral ∫ ds dr. Because for a small arc length ds times a small distance dr you become a rectangle.. "/>
r = 2 + 3sin θ. When the value of a is less than the value of b, the graph is a limacon with and inner loop. r = 5 + cos 4 θ. When the value of a is greater than the value of b, the graph is a dimpled limacon. r = 5 –2 sin θ. When the value of a is greater than or equal to the value of 2b, the graph is a convex limacon. r = 2 – 2 sin θ..
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