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[" Let,"y=sin^(-1)(sin8)-tan^(-1)(tan10)...

[" Let,"y=sin^(-1)(sin8)-tan^(-1)(tan10)+cos^(-1)(cos12)-sec^(-1)(sec9)+cot^(-1)(cot6)],[-cos e^(-1)(cos ec7)],[" If "y" simplifies to "a pi+b" then "(a-b)-50]

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Let y = sin^-1 (sin8) - tan^-1(tan 10) + co^-1 '(cos1 2)-sec^-1 (sec9) + cot^-1(cot6) _ cosec^-1(cosec 7 ). If y simplifies to api + b , then find (a-b).

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