Suppose I want to draw a horse. I don't know how to draw a horse so I buy a How to Draw Animals book and follow the instructions of the book to draw a horse. Now can I use my drawing for commercial purposes?
The book teaches you how to draw horses. Once you learned how to do it, and you draw a really nice horse, you have drawn it yourself. You have the copyright. You use it any way you like.
Of course it's different if instead of drawing the horse yourself you just make a copy of an image in the book. That would be the author's copyrighted drawing.
Added since the question reappeared: One way to learn drawing horses is to start by making copies by hand of others' good drawings, practicing, practicing more, until eventually you can draw your own horses, which was the purpose of the book. So these copies made as part of the learning process might be treated differently. And the might not actually be copies, just your best attempt at making a copy.
On the other hand, taking this book, making ten copies using a scanner, framing and selling them, is obvious copyright infringement.