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[" ii) If "(If)cosec A+sec A=cosec B+sec...

[" ii) If "(If)cosec A+sec A=cosec B+sec B," Sambi "],[quad tan A*tan B=cot(A+B)/(2)]

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If cosec A + sec A = cosec B + sec B , prove that tan A tan B = cot( A+ B)/ 2

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(sec A sec B+tan A tan B)^(2)-(sec A tan B+tan A sec B)^(2)=1

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