People's Education Edition and Shanghai Education Edition are two different teaching material systems, and the teaching material content and teaching content are also different. The trigonometric function part of the ninth grade of People's Education Press often introduces and explains the acute angle trigonometric ratio. If you need to know more about the acute triangle ratio, you can refer to the ninth grade mathematics textbook published by People's Education Press.

Electronic textbooks of People's Education Publishing House provide navigation of new and old electronic textbooks for primary schools, junior high schools and senior high schools, including Chinese, mathematics, English, history, geography, politics, physics, chemistry and bioelectronics textbooks.