My Plan, before entering college calculus

I will need to boost my math skills for graduate school sadly, with that being said I am determined to learn calculus on my own before I even set foot in the class room.

So far I have bought the following texts to work through before starting my studies in calculus.

Algebra Amazon.com: Algebra Demystified : A Self Teaching Guide (Demystified): Rhonda Huettenmueller: Books

College Algebra Amazon.com: College Algebra Demystified: Rhonda Huettenmueller: Books

Pre Calculus Amazon.com: College Algebra Demystified: Rhonda Huettenmueller: Books

Calculus Amazon.com: College Algebra Demystified: Rhonda Huettenmueller: Books paired up with some college text.

Is a trigonometry book absolutley needed? I figured the pre-cal book would cover much of what I needed to know trig related before I started calculus.

Many thanks