Please write one or two paragraphs on each topic. Express your vision of the topic in your own words

1. Explain why trigonometric functions are periodic.

2. Give an example of application of trigonometry to real life problems.

Please write one or two paragraphs on each topic. Express your vision of the topic in your own worlds.

1. What is the geometric sense of a linear system in two variables and a linear system in three variables?

2. How do we use determinants for solving a system of linear equations?

3. Describe in your own words the meaning of inverse matrix.