1, the symmetry axis of trigonometric function x=kπ+π/2, trigonometric function is one of the basic elementary functions, which takes angle as the independent variable, and the coordinate or its ratio of the intersection point between the terminal edge of any angle and the unit circle is the dependent variable. It can also be equivalently defined as the lengths of various line segments related to the unit circle.
Trigonometric function plays an important role in studying the properties of geometric shapes such as triangles and circles, and is also a basic mathematical tool for studying periodic phenomena. In mathematical analysis, trigonometric function is also defined as the solution of infinite series or specific differential equation, which allows its value to be extended to any real value or even complex value.
2. Symmetry center formula of trigonometric function: y=sinx. Rotate the figure around a point 180. If it can coincide with another figure, then the two figures are said to be symmetrical about this point, which is called the center of symmetry.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.