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Function std.math.trigonometry.cos
Returns cosine of x. x is in radians.
real cos
(
real x
) pure nothrow @nogc @safe;
double cos
(
double x
) pure nothrow @nogc @safe;
float cos
(
float x
) pure nothrow @nogc @safe;
x | cos(x) | invalid? |
---|---|---|
NAN | NAN | yes |
±∞ | NAN | yes |
Bugs
Results are undefined if |x| >= 264.
Example
import std .math .operations : isClose;
writeln(cos(0.0)); // 1.0
assert(cos(1.0) .isClose(0.5403023059));
assert(cos(3.0) .isClose(-0.9899924966));
Authors
Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.