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What is the area of a segment of a circl...

What is the area of a segment of a circle of radius r subtending an angle `theta` at the centre ?

A

`1/2r^2theta`

B

`1/2r^2(theta -2sin"" theta/2cos"" theta/2)`

C

`1/2r^2(theta - sin ""theta/2 cos"" theta/2)`

D

`1/2r^2sin"" theta/2cos "" theta/2`

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