Sqrt[z] or Sqrt[z] gives the square root of z.

All the functionality of Miscellaneous`ResonanceAbsorptionLines`is now available in the newly created Resonance Absorption Lines Package.

ArcTanh[z] gives the inverse hyperbolic tangent tanh -1 (z) of the complex number z.

HaarWavelet[] represents a Haar wavelet.

RootOfUnityQ[a] yields True if a is a root of unity, and yields False otherwise.

RegionPlot[pred, {x, x_min, x_max}, {y, y_min, y_max}] makes a plot showing the region in which pred is True.

With careful attention to branch cuts, Mathematica supports trigonometric functions everywhere in the complex plane, with extensive exact and algebraic transformations, ...

Dispatch[{lhs_1 -> rhs_1, lhs_2 -> rhs_2, ...}] generates an optimized dispatch table representation of a list of rules. The object produced by Dispatch can be used to give ...

Numerical root finding. NSolve gives you numerical approximations to all the roots of a polynomial equation. You can also use NSolve to solve sets of simultaneous equations ...

BSplineCurve[{pt_1, pt_2, ...}] is a graphics primitive that represents a non-uniform rational B-spline curve with control points pt_i.