Find the length of the polar curve.
$$r = 3 \cos \theta , 0 \leq \theta \leq \frac { 3 \pi } { 4 }$$
A) $\frac { 9 \pi } { 11 }$
B) $\frac { \pi } { 3 }$
C) $\frac { 9 } { 4 }$
D) $\frac { 9 \pi } { 4 }$
E) None of these

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The Answer of Find the length of the polar curve.
$$r = 3 \cos \theta , 0 \leq \theta \leq \frac { 3 \pi } { 4 }$$
A) $\frac { 9 \pi } { 11 }$
B) $\frac { \pi } { 3 }$
C) $\frac { 9 } { 4 }$
D) $\frac { 9 \pi } { 4 }$
E) None of these

Find the Length of the Polar Curve r=3cos⁡θ,0≤θ≤3π4r = 3 \cos \theta , 0 \leq \theta \leq \frac { 3 \pi } { 4 }r=3cosθ,0≤θ≤43π​

Find the Length of the Polar Curve $r = 3 \cos \theta , 0 \leq \theta \leq \frac { 3 \pi } { 4 }$