Can someone show working for 19 b, c

https://imgur.com/gallery/ZWmLu

Can someone show working for 19 b, c

https://imgur.com/gallery/ZWmLu
$\noindent Recall the formula for the area of a segment: A = \frac{1}{2}r^{2}(\theta -\sin \theta). Using this, for 19(b), we have 1 = \frac{1}{2}\times 1^{2} (\theta -\sin \theta). Now use your work from part (a). Make sure to express the answer in degrees as the question asks for.$

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