Mathematics
Trigonometry
Basic properties and graphs of trigonometric functions
Reduction formulas
Addition formulas
Inverse trigonometric functions
Trigonometric functions of an arbitrary angle
Trigonometric equations
Properties of trigonometric functions
Formulas of trigonometric functions of double and half angles
Degree and radian measures of the angle
Identical transformations of trigonometrical expressions
Trigonometric inequality
Basic trigonometric identities
Converting the sum and difference of trigonometric functions into a product
Equations involving inverse trigonometric functions
System of trigonometric equations
The inequalities containing the inverse trigonometrical functions
Transformation products of trigonometric functions in the sum or difference