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Function std.complex.expi

Prototype

Complex!(real) expi(
  real y
) pure nothrow @nogc @trusted;

Parameters

NameDescription
y A real number.

Returns

The value of cos(y) + i sin(y).

Note

expi is included here for convenience and for easy migration of code that uses std.math.expi. Unlike std.math.expi, which uses the x87 fsincos instruction when possible, this function is no faster than calculating cos(y) and sin(y) separately.

Example

assert(expi(1.3e5L) == complex(std.math.cos(1.3e5L), std.math.sin(1.3e5L)));
assert(expi(0.0L) == 1.0L);
auto z1 = expi(1.234);
auto z2 = std.math.expi(1.234);
assert(z1.re == z2.re && z1.im == z2.im);

Authors

Lars Tandle Kyllingstad, Don Clugston

License

Boost License 1.0

Comments