Trigonometric formulas

基本的三角公式

Trigonometric formulas:

- Basic trigonometric identities

- Double-argument formulas

- Formulas of the triple argument

- Half-argument formulas

- Squares formulas for trigonometric functions

- Cube formulas for trigonometric functions

- Formulas of trigonometric functions in the fourth degree

- Addition and difference formulas for trigonometric functions

- Formulas for the sum of trigonometric functions

- The difference formulas for trigonometric functions

- Formulas of products of trigonometric functions

- Formulas for reducing trigonometric functions

- Table of values ​​of basic trigonometric functions

- Solution of trigonometric equations

- Relations of inverse trigonometric functions

- Signs of trigonometric functions in quarters

- Trigonometric constants