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If A+B+C=pi and cosA cosecB cosecC + cos...

If A+B+C=`pi` and cosA cosecB cosecC + cosB cosecA cosecC + cosC cosecA cosecB = s and 1+ cot`81^@`+ cot`54^@` + cot`81^@ cot54^@`= p, then

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