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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?
NAN	NAN	yes
±0.0	±0.0	no
±∞	NAN	yes

Example

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)));

Authors

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

License

Boost License 1.0.