caption: The image shows an engraving of a book with a picture of a man and a woman on it. The man is holding a book in his hands and the woman is looking at him intently. The text on the paper reads "Trigonometria". The man and woman are both wearing traditional clothing and appear to be looking at each other intently, as if they are discussing something important. The background of the paper is a light blue color, and the text is written in a bold black font.