If a,b, c are in AP then prove cotA/2, cotB/2, cotC/2 are in AP

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D Francis Larana Kumar · Answer

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If a,b, c are in AP then prove cotA/2, cotB/2, cotC/2 are in AP

If a,b, c are in AP then prove cotA/2, cotB/2, cotC/2 are in AP

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