1.

If the mapping f(x)=ax+b,a>0 maps [−1,1] onto [0,2] then cot[cot−17+cot−18+cot−118] is equal to

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If the mapping f(x)=ax+b,a>0 maps [1,1] onto [0,2] then cot[cot17+cot18+cot118] is equal to



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