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Function std.math.trigonometry.tan

Returns tangent of x. x is in radians.

real tan (
  real x
) pure nothrow @nogc @safe;

double tan (
  double x
) pure nothrow @nogc @safe;

float tan (
  float x
) pure nothrow @nogc @safe;

Special Values
x tan(x) invalid?
±0.0 ±0.0 no
±∞ NAN yes


import std.math.operations : isClose;
import std.math.traits : isIdentical;
import std.math.constants : PI;
import std.math.algebraic : sqrt;

assert(isIdentical(tan(0.0), 0.0));
assert(tan(PI).isClose(0, 0.0, 1e-10));
assert(tan(PI / 3).isClose(sqrt(3.0)));


Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger


Boost License 1.0.