Trigonometric formulas. Direct

Trigonometric formulas (trigonometric formulas) or trigonometric identities describe the relationship between sine, cosine, tangent, and cotangent and are used in solving mathematical problems.

Trigonometric formulas:

- Basic trigonometric identities

- Formulas of the double argument

- 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

- Difference formulas for trigonometric functions

- Formulas of products of trigonometric functions

- Equivalence formulas for trigonometric functions

- Table of values ​​of the main trigonometric functions

- The solution of trigonometric equations

- Relations of inverse trigonometric functions

- Signs of trigonometric functions in quarters

- Trigonometric constants