Answer
$5\pi$
Work Step by Step
Here, $A=2 \int_{-(\pi/2)}^{(\pi/2)} (\dfrac{1}{2}) [2(1+\sin \theta)]^2 d\theta-\pi$
This gives:
$A=[6 (\theta)-8 \cos (\theta)-\sin (2\theta)]_{-(\pi/2)}^{(\pi/2)}-\pi$
Hence, $A=3\pi -(-3 \pi)-\pi=6 \pi-\pi=5\pi$