ArcSecDegrees

ArcSecDegrees[z]

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)

Results are in degrees:

Calculate the angle BAC of this right triangle:

Calculate by hand:

The numerical value of this angle:

Solve an inverse trigonometric equation:

Solve an inverse trigonometric inequality:

Apply ArcSecDegrees to the following list:

Plot over a subset of the reals:

Asymptotic expansion at Infinity:

Scope  (37)

Numerical Evaluation  (6)

Evaluate numerically:

Evaluate to high precision:

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

Evaluate for complex arguments:

Evaluate ArcSecDegrees efficiently at high precision:

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

Or compute average-case statistical intervals using Around:

Compute the elementwise values of an array:

Or compute the matrix ArcSecDegrees function using MatrixFunction:

Specific Values  (5)

Values of ArcSecDegrees at fixed points:

Simple exact values are generated automatically:

Values at infinity:

Zero of ArcSecDegrees:

Find the value of satisfying equation :

Substitute in the value:

Visualize the result:

Visualization  (4)

Plot the ArcSecDegrees function:

Plot over a subset of the complexes:

Plot the real part of ArcSecDegrees:

Plot the imaginary part of ArcSecDegrees:

Polar plot with ArcSecDegrees:

Function Properties  (10)

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

Complex domain:

ArcSecDegrees achieves all real values from the interval except :

The range for complex values:

ArcSecDegrees is not an analytic function:

Nor is it meromorphic:

ArcSecDegrees is monotonic in a specific range:

ArcSecDegrees is injective:

ArcSecDegrees is not surjective:

ArcSecDegrees is non-negative on its real domain:

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

ArcSecDegrees is neither convex nor concave:

ArcSecDegrees is concave for x in [1,):

TraditionalForm formatting:

Differentiation  (3)

First derivative:

Higher derivatives:

Formula for the ^(th) derivative:

Integration  (2)

Indefinite integral of ArcSecDegrees:

Definite integral over the interval :

Series Expansions  (4)

Find the Taylor expansion using Series:

Plot the first three approximations for ArcSecDegrees around :

Find series expansions at branch points and branch cuts:

Asymptotic expansion at a singular point:

ArcSecDegrees can be applied to power series:

Function Identities and Simplifications  (2)

Simplify expressions involving ArcSecDegrees:

Use TrigToExp to express through logarithms and square roots:

Function Representations  (1)

Represent using ArcCosDegrees:

Applications  (6)

Solve inverse trigonometric equations:

Solve an inverse trigonometric equation with a parameter:

Use Reduce to solve inequalities involving ArcSecDegrees:

Numerically find a root of a transcendental equation:

Plot the function to check if the solution is correct:

Plot the real and imaginary parts of ArcSecDegrees:

Different combinations of ArcSecDegrees with trigonometric functions:

Properties & Relations  (6)

Compositions with the inverse trigonometric functions:

Use PowerExpand to disregard multivaluedness of the ArcSecDegrees:

Alternatively, evaluate under additional assumptions:

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

Simplify result:

This shows the branch cut of the ArcSecDegrees function:

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

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

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

Neat Examples  (2)

Solve trigonometric equations involving ArcSecDegrees:

Numerical value of this angle in degrees:

Plot ArcSecDegrees at integer points:

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.

CMS

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

BibTeX

@misc{reference.wolfram_2024_arcsecdegrees, author="Wolfram Research", title="{ArcSecDegrees}", year="2024", howpublished="\url{https://reference.wolfram.com/language/ref/ArcSecDegrees.html}", note=[Accessed: 21-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_arcsecdegrees, organization={Wolfram Research}, title={ArcSecDegrees}, year={2024}, url={https://reference.wolfram.com/language/ref/ArcSecDegrees.html}, note=[Accessed: 21-November-2024 ]}