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Simplify (1+tan^2x)(1+cos2x)? Why the heat of neutralization of strong acid/large than that of a weak acid? 3 GRID TO EQUAL 5 ONLY USING 1-9? Difficult math queestion? 1.4 eV electron has a 10-4 probability of tunneling through a 2.5 eV barrier.What is the prob a 1.4 eV proton going through the same barrier?