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Knowledge of mathematics is useful in life. It's not about solving trigonometric equations.  Reason 1. Ambiguity      How did the reforms of Peter I affect the development of the state? A controversial topic. Why did certain events happen in history? Can a legal state listen to its citizens? An ambiguous issue.      And finally: 3x + 4x = 7x. Yesterday, 50 years ago, in Africa, in crisis, in bad weather. Reason 2. Development of thinking      A child has learned to count, if he is only engaged in calculation, sooner or later he will lag behind in development. Of course, the brain can calculate using complex algorithms. But not the depth of thinking, only the speed develops.      Later, geometry, trigonometry, stereometry, and logarithms are introduced. Each successively more complex topic helps the development of the student's mental capacity: analysis and generalization skills, abstract thinking, the ability to think with...

 What does chemistry study!!!      Chemistry is a science that studies the structure and transformation of substances. Chemistry, along with other sciences, was created as a product of human activity and was created to satisfy natural needs, produce necessary products, convert one to another, and, finally, to know the secrets of various phenomena. In ancient times, people knew how to extract metals from ores, prepare and use various alloys, including making glass, and use it for various purposes. It is known that crafts based on chemical processes developed in Egypt before Christ. Preparation of tanned leather, dyeing it, production of coloured glass, preparation of medicines and aromatic substances from plants, and production of ceramics have been established. In those times, chemical products were also produced in India, China and Central Asia. The chemist who is the owner of "Kimyoi Hunar" was engaged in the preparation of another product from one substance. ...