- Find the exact values of sin 2u, cos 2u, and tan 2u if sec u = - 2, pi/2 < u < pi?

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Why are molybdenum magnets so much stronger than iron magnets? What happens if you overheat a solution of Copper (II) sulfate? A circle could be described as a? Calculate the equilibrium concentrations of [NH3], [NH4+] and [OH-] in a solution originally 0.100 M NH3.? The volume of a gas at 91.0 kPa is 200.0 mL. If the pressure is increased to 179 kPa, what will be the new volume?