WOLFRAM

gives the arc secant in degrees of the complex number .

Details

  • ArcSecDegrees, along with other inverse trigonometric and trigonometric functions, is studied in high-school geometry courses and is also used in many scientific disciplines.
  • All results are given in degrees.
  • For real outside the interval to , the results are always in the range to , excluding .
  • ArcSecDegrees[z] returns the angle in degrees for which the ratio of the hypotenuse to the adjacent side of a right triangle is .
  • For certain special arguments, ArcSecDegrees automatically evaluates to exact values.
  • ArcSecDegrees can be evaluated to arbitrary numerical precision.
  • ArcSecDegrees automatically threads over lists.
  • ArcSecDegrees[z] has a branch cut discontinuity in the complex plane running from to .
  • ArcSecDegrees can be used with Interval, CenteredInterval and Around objects.
  • Mathematical function, suitable for both symbolic and numerical manipulation.

Examples

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Basic Examples  (7)Summary of the most common use cases

Results are in degrees:

Out[1]=1

Calculate the angle BAC of this right triangle:

Calculate by hand:

Out[2]=2

The numerical value of this angle:

Out[3]=3

Solve an inverse trigonometric equation:

Out[1]=1

Solve an inverse trigonometric inequality:

Out[1]=1

Apply ArcSecDegrees to the following list:

Out[1]=1

Plot over a subset of the reals:

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Asymptotic expansion at Infinity:

Out[1]=1

Scope  (37)Survey of the scope of standard use cases

Numerical Evaluation  (6)

Evaluate numerically:

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Evaluate to high precision:

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The precision of the output tracks the precision of the input:

Out[2]=2

Evaluate for complex arguments:

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Evaluate ArcSecDegrees efficiently at high precision:

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Out[2]=2

Compute worst-case guaranteed intervals using Interval and CenteredInterval objects:

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Out[2]=2
Out[3]=3

Or compute average-case statistical intervals using Around:

Out[4]=4

Compute the elementwise values of an array:

Out[1]=1

Or compute the matrix ArcSecDegrees function using MatrixFunction:

Out[2]=2

Specific Values  (5)

Values of ArcSecDegrees at fixed points:

Out[1]=1

Simple exact values are generated automatically:

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Values at infinity:

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Out[2]=2

Zero of ArcSecDegrees:

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Find the value of satisfying equation :

Out[2]=2

Substitute in the value:

Out[3]=3

Visualize the result:

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Visualization  (4)

Plot the ArcSecDegrees function:

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Plot over a subset of the complexes:

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Plot the real part of ArcSecDegrees:

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Plot the imaginary part of ArcSecDegrees:

Out[2]=2

Polar plot with ArcSecDegrees:

Out[1]=1

Function Properties  (10)

ArcSecDegrees is defined for all real values except from the interval :

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Complex domain:

Out[2]=2

ArcSecDegrees achieves all real values from the interval except :

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The range for complex values:

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ArcSecDegrees is not an analytic function:

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Nor is it meromorphic:

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ArcSecDegrees is monotonic in a specific range:

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Out[2]=2
Out[3]=3
Out[4]=4

ArcSecDegrees is injective:

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Out[2]=2

ArcSecDegrees is not surjective:

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ArcSecDegrees is non-negative on its real domain:

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It has both singularity and discontinuity for x in [-1,1]:

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Out[2]=2

ArcSecDegrees is neither convex nor concave:

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ArcSecDegrees is concave for x in [1,):

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Out[3]=3

TraditionalForm formatting:

Differentiation  (3)

First derivative:

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Higher derivatives:

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Out[2]=2

Formula for the ^(th) derivative:

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Integration  (2)

Indefinite integral of ArcSecDegrees:

Out[1]=1

Definite integral over the interval :

Out[1]=1

Series Expansions  (4)

Find the Taylor expansion using Series:

Out[1]=1

Plot the first three approximations for ArcSecDegrees around :

Out[3]=3

Find series expansions at branch points and branch cuts:

Out[1]=1
Out[2]=2

Asymptotic expansion at a singular point:

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ArcSecDegrees can be applied to power series:

Out[1]=1

Function Identities and Simplifications  (2)

Simplify expressions involving ArcSecDegrees:

Out[1]=1

Use TrigToExp to express through logarithms and square roots:

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Function Representations  (1)

Represent using ArcCosDegrees:

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Applications  (6)Sample problems that can be solved with this function

Solve inverse trigonometric equations:

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Out[2]=2

Solve an inverse trigonometric equation with a parameter:

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Use Reduce to solve inequalities involving ArcSecDegrees:

Out[1]=1

Numerically find a root of a transcendental equation:

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Plot the function to check if the solution is correct:

Out[2]=2

Plot the real and imaginary parts of ArcSecDegrees:

Out[1]=1

Different combinations of ArcSecDegrees with trigonometric functions:

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Properties & Relations  (6)Properties of the function, and connections to other functions

Compositions with the inverse trigonometric functions:

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Use PowerExpand to disregard multivaluedness of the ArcSecDegrees:

Out[2]=2

Alternatively, evaluate under additional assumptions:

Out[3]=3

Use FunctionExpand to convert trigs of arctrigs into an algebraic function:

Out[1]=1

Simplify result:

Out[2]=2

This shows the branch cut of the ArcSecDegrees function:

Out[1]=1

ArcSecDegrees gives the angle in degrees, while ArcSec gives the same angle in radians:

Out[1]=1
Out[2]=2

FunctionExpand applied to ArcSecDegrees generates expressions in trigonometric functions in radians:

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Out[2]=2

ExpToTrig applied to the outputs of TrigToExp will generate trigonometric functions in radians:

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Out[2]=2

Neat Examples  (2)Surprising or curious use cases

Solve trigonometric equations involving ArcSecDegrees:

Out[1]=1

Numerical value of this angle in degrees:

Out[2]=2

Plot ArcSecDegrees at integer points:

Out[1]=1
Wolfram Research (2024), ArcSecDegrees, Wolfram Language function, https://reference.wolfram.com/language/ref/ArcSecDegrees.html.
Wolfram Research (2024), ArcSecDegrees, Wolfram Language function, https://reference.wolfram.com/language/ref/ArcSecDegrees.html.

Text

Wolfram Research (2024), ArcSecDegrees, Wolfram Language function, https://reference.wolfram.com/language/ref/ArcSecDegrees.html.

Wolfram Research (2024), ArcSecDegrees, Wolfram Language function, https://reference.wolfram.com/language/ref/ArcSecDegrees.html.

CMS

Wolfram Language. 2024. "ArcSecDegrees." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ArcSecDegrees.html.

Wolfram Language. 2024. "ArcSecDegrees." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ArcSecDegrees.html.

APA

Wolfram Language. (2024). ArcSecDegrees. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ArcSecDegrees.html

Wolfram Language. (2024). ArcSecDegrees. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ArcSecDegrees.html

BibTeX

@misc{reference.wolfram_2025_arcsecdegrees, author="Wolfram Research", title="{ArcSecDegrees}", year="2024", howpublished="\url{https://reference.wolfram.com/language/ref/ArcSecDegrees.html}", note=[Accessed: 25-May-2025 ]}

@misc{reference.wolfram_2025_arcsecdegrees, author="Wolfram Research", title="{ArcSecDegrees}", year="2024", howpublished="\url{https://reference.wolfram.com/language/ref/ArcSecDegrees.html}", note=[Accessed: 25-May-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_arcsecdegrees, organization={Wolfram Research}, title={ArcSecDegrees}, year={2024}, url={https://reference.wolfram.com/language/ref/ArcSecDegrees.html}, note=[Accessed: 25-May-2025 ]}

@online{reference.wolfram_2025_arcsecdegrees, organization={Wolfram Research}, title={ArcSecDegrees}, year={2024}, url={https://reference.wolfram.com/language/ref/ArcSecDegrees.html}, note=[Accessed: 25-May-2025 ]}