Which of the following is equal to the radius of the circle if the octagon is a regular octagon?

\frac{S}{2 S i n 45^{\circ}}

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\frac{S}{2 C o s {22.5}^{\circ}}

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\frac{S}{2 S i n {67.5}^{\circ}}

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\frac{S}{2 C o s {67.5}^{\circ}}

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Solution

The correct option is D $\frac{S}{2 C o s {67.5}^{\circ}}$

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