- Tan 42 = cot.......? with steps please?

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Do all of the molecules in a 1 mol sample of CH4(g) have the same velocity at 546 K? Is it possible to visit Uranus or Neptune? Need to find the solutions to |2x| + y = 1 and x + 2y = -1? 24.4 cubic ft in length equals how many regular inches? Equation for the synthesis of N-(2-chloroethyl piperidine)?