I've already asked a question of this nature and I'd like to ask another. I'm looking for a precalculus text that includes a significant discussion of complex numbers, especially graphing in the complex plane and the connection between the unit circle, complex numbers, and the trigonometric functions. Is a questions asking for such books on-topic?

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    $\begingroup$ I wouldn't consider it off-topic. $\endgroup$ – Joel Reyes Noche Feb 3 '16 at 0:47

Question on selecting textbooks and alike are on-topic. But one should take care to ask a specific question, rather than something too broad and/or primarily opinion based.

The specific question you propose seems fine to me.

Examples that would not be good include:

  • What is the best textbook on Abstract Algebra? (too opinion based, especially as no criteria are specified)

  • What textbooks for Calculus are available? (too broad)

General SE references on this include:

Not everything there applies verbatim, but there are some good points there that also seem pertinent to the type of question you ask about.

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