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10. std.intrinsic
11. std.math
  1. * Constants
  2. sin
  3. cos
  4. tan
  5. sinh
  6. cosh
  7. pow
  8. sqrt
  9. floor
  10. ceil
  11. isnan
  12. isinf
  13. isfinite
  14. frexp
  15. ldexp
  16. hypot
  17. copysign
  18. signbit
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About this documentation

tan

real tan(real x)

Returns the tangent of x (radians).

If x is ±INFINITY, the function returns ±NAN.

Example:

//don't forget to import std.stdio and std.math :-)

writefln("tan(0)    is %f",tan(0));
writefln("tan(PI/2) is %f",tan(PI/2));
writefln("tan(PI/4) is %f",tan(PI/4));
writefln("tan(INF)  is %f",tan(float.infinity));
writefln("tan(-INF) is %f",tan(-float.infinity));

Output:

tan(0)    is 0.000000
tan(PI/2) is 16331778728383843.837
tan(PI/4) is 1.000000
tan(INF)  is nan
tan(-INF) is nan