- How would you prove lim x-> 0 cos (x) = 1 checking if (-pi/2, pi/2) , 0 <= 1- cos x?

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How many degrees of strog base and strog acid? A reaction produced 52.1 g of kcl how much o2 was produced in grams? What is the partial pressure of N2 in a mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr? Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? Why anti Rh antibodies destroy foetal lamphocytes and dot effect mother s lamphocytes?