Question

find length of polar curve.
r=6/(1+cos(theta), 0<= theta<=(pi/2)

Answer 1

\[r=6/1+cos \theta , 0\le \theta \le (\pi/2)\]

Answer 2

\[\int\limits_{ }^{ }\sqrt{r ^{2} - (r \prime)^{2}} d \theta \]

Answer 3

that second term is { dr/d(theta) }^2