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  2. Inverse trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/Inverse_trigonometric...

    The absolute value is necessary to compensate for both negative and positive values of the arcsecant and arccosecant functions. The signum function is also necessary due to the absolute values in the derivatives of the two functions, which create two

  3. List of integrals of inverse trigonometric functions - Wikipedia

    en.wikipedia.org/wiki/List_of_integrals_of...

    The following is a list of indefinite integrals (antiderivatives) of expressions involving the inverse trigonometric functions.For a complete list of integral formulas, see lists of integrals.

  4. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    This allows the two congruent purple-outline triangles and to be constructed, each with hypotenuse ⁡ and angle at their base. The sum of the heights of the red and blue triangles is sin ⁡ θ + sin ⁡ φ {\displaystyle \sin \theta +\sin \varphi } , and this is equal to twice the height of one purple triangle, i.e. 2 sin ⁡ p cos ⁡ q ...

  5. Inverse hyperbolic functions - Wikipedia

    en.wikipedia.org/wiki/Inverse_hyperbolic_functions

    It is defined everywhere except for non-positive real values of the variable, for which two different values of the logarithm reach the minimum. For all inverse hyperbolic functions, the principal value may be defined in terms of principal values of the square root and the logarithm function.

  6. Sec-1 - Wikipedia

    en.wikipedia.org/wiki/Sec-1

    Sec-1, SEC-1, sec-1, or sec −1 may refer to: . sec x−1 = sec(x)−1 = exsec(x) or exsecant of x, an old trigonometric function; sec −1 y = sec −1 (y), sometimes interpreted as arcsec(y) or arcsecant of y, the compositional inverse of the trigonometric function secant (see below for ambiguity)

  7. Wikipedia:Reference desk/Archives/Mathematics/2013 August 26 ...

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    1.1 Values of the arcsecant function. 3 comments. 1.2 Limit of an (infinite) sum, and teaching a man how to fish. 15 comments. 1.3 Definition of Division. 2 comments.

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  9. Trigonometry - Wikipedia

    en.wikipedia.org/wiki/Trigonometry

    2.2 The unit circle and common trigonometric values. 3 Trigonometric functions of real or complex variables. ... arcsecant: y = arcsec(x) x = sec(y) x ≤ −1 or 1 ...