Cos (Built-in Mathematica Symbol)

Cos[z] gives the cosine of z.

Coth (Built-in Mathematica Symbol)

Coth[z] gives the hyperbolic cotangent of z.

Cot (Built-in Mathematica Symbol)

Cot[z] gives the cotangent of z.

Csc (Built-in Mathematica Symbol)

Csc[z] gives the cosecant of z.

EllipticK (Built-in Mathematica Symbol)

EllipticK[m] gives the complete elliptic integral of the first kind K(m).

EulerPhi (Built-in Mathematica Symbol)

EulerPhi[n] gives the Euler totient function \[Phi](n).

Factorial (Built-in Mathematica Symbol)

n! gives the factorial of n.

Function (Built-in Mathematica Symbol)

Function[body] or body & is a pure function. The formal parameters are # (or #1), #2, etc. Function[x, body] is a pure function with a single formal parameter x. ...

Gamma (Built-in Mathematica Symbol)

Gamma[z] is the Euler gamma function \[CapitalGamma](z). Gamma[a, z] is the incomplete gamma function \[CapitalGamma](a, z). Gamma[a, z_0, z_1] is the generalized incomplete ...

Hypergeometric2F1 (Built-in Mathematica Symbol)

Hypergeometric2F1[a, b, c, z] is the hypergeometric function \[InvisiblePrefixScriptBase]_2 F_1 (a, b; c; z).