The trigonometric function sec allows to calculate the secant of an angle expressed in radians, degrees, or grades.

The secant trigonometric function noted sec, allows the calculation of the secant of an angle, it is possible to use different angular units: the radian which is the default angular unit, the degree or the grade. The secant function is equal to the inverse of the cosine function, `sec(x)=1/cos(x)`

- Compute the secant
- Special secant values table
- Derivative of secant
- Antiderivative of secant
- Properties of the secant function

The **secant calculator** allows through the sec function to **calculate**
**online** the **secant** secant of an angle in radians, you must first
select the desired unit by clicking on the options button calculation module.
After that, you can start your calculations.

To **calculate secant online** of `pi/6`, enter
sec(`pi/6`), after calculation, the result
is returned.

Note that the secant function is able to recognize some special angles and make the calculations with special associated values in exact form.

To **calculate the secant of an angle** in degrees, you must first select the desired unit
by clicking on the options button calculation module. After that, you can start your calculus.

To calculate secant of 45, enter sec(45), after calculation, the restults is returned.

To calculate the secant of an angle in gradians, you must first select the desired unit by clicking on the options button calculation module. After that, you can start your calculus.

To calculate secant of 50, enter sec(50), after computation, the result is returned.

Note that the secant function is able to recognize some special angles and do the calculus with special associated exact values.

The secant admits some special values which the calculator is able to determine in exact forms. Here is a table of
the **commonsecant values**:

Value | sec | Result |
---|---|---|

0 | sec(`0`) | 1 |

`pi/6` | sec(`pi/6`) | `1/(2*sqrt(3))` |

`pi/4` | sec(`pi/4`) | `sqrt(2)/2` |

`pi/3` | sec(`pi/3`) | `2` |

`2*pi/3` | sec(`2*pi/3`) | `-2` |

`3*pi/4` | sec(`3*pi/4`) | `-sqrt(2)/2` |

`5*pi/6` | sec(`5*pi/6`) | `-2/sqrt(3)` |

`pi` | sec(`pi`) | -1 |

The derivative of the secant is equal to `sin(x)/cos(x)^2``=``tan(x)*sec(x)`.

The antiderivative of the secant is equal to `1/2*ln((1+sin(x))/(1-sin(x)))`.

The **secant** function is an even function, for every real x, `sec(-x)=sec(x)`.
The consequence for the curve representative of the secant function is that it admits the axis of the ordinates as axis of symmetry.

sec(x), where x is the measure of an angle in degrees, radians, or gradians.

sec(`0`), returns 1

To differentiate function secant online, it is possible to use the derivative calculator which allows the calculation of the derivative of the secant function

The **derivative of sec(x)** is derivative(`sec(x)`)=`sin(x)/cos(x)^2`

Antiderivative calculator allows to calculate an antiderivative of secant function.

An **antiderivative of sec(x)** is antiderivative(`sec(x)`)=`1/2*ln((1+sin(x))/(1-sin(x)))`

The limit calculator allows the calculation of limits of the secant function.

The **limit of sec(x)** is limit(`sec(x)`)

The graphing calculator is able to plot secant function in its definition interval.

See also

- Arccosine : arccos. The arccos function allows the calculation of the arc cosine of a number. The arccos function is the inverse functions of the cosine function.
- Arcsine : arcsin. The arcsin function allows the calculation of the arc sine of a number. The arcsin function is the inverse function of the sine function.
- Arctangent : arctan. The arctan function allows the calculation of the arctan of a number. The arctan function is the inverse functions of the tangent function.
- Trigonometric Calculator : simplify_trig. Calculator wich uses trigonometric formula to simplify trigonometric expression.
- Cosine : cos. The cos trigonometric function calculates the cos of an angle in radians, degrees or gradians.
- Cosecant : cosec. The trigonometric function sec allows to calculate the secant of an angle expressed in radians, degrees, or grades.
- Cotangent : cotan. The cotan trigonometric function to calculate the cotan of an angle in radians, degrees or gradians.
- Trigonometric expansion : expand_trigo. The calculator makes it possible to obtain the trigonometric expansion of an expression.
- Trigonometric linearization : linearization_trigo. Calculator that allows to linearize a trigonometric expression.
- Simplify Calculator : simplify. Calculator wich can simplify an algebraic expression online.
- Secant : sec. The trigonometric function sec allows to calculate the secant of an angle expressed in radians, degrees, or grades.
- Sine : sin. The sin trigonometric function to calculate the sin of an angle in radians, degrees or gradians.
- Tangent : tan. The tan trigonometric function to calculate the tan of an angle in radians, degrees or gradians.