For review material, a Google search for “precalculus problems with solutions” should turn up relevant material. If you are having trouble with a particular problem, we're usually willing to look at your work and discuss it with you.

Here are some resources that you might find helpful.

• A decent textbook: Precalculus: An Investigation of Functions -- Lippman and Rasmissen.¹⁾

• Solutions for that text: precalc_solutionsoct.pdf ²⁾

• The Khan Academy Precalc page.
  They cover way more than you need. We'd suggest that you use just the sections on polynomials, trigonometry, composite functions, and the parts of “conic sections” that involve circles.