External module "math/base/special/haversin/docs/types/index.d"

Export assignment haversin

• haversin(x: number): number

• Computes the half-value versed sine.

  Notes

  • The half-value versed sine is defined as (1 - cos(x)) / 2.

  Parameters

  • x: number

    input value (in radians)

  Returns number

  half-value versed sine

  Example

  var v = haversin( 0.0 );
  // returns 0.0

  Example

  var v = haversin( 3.141592653589793/2.0 );
  // returns ~0.5

  Example

  var v = haversin( -3.141592653589793/6.0 );
  // returns ~0.06699

  Example

  var v = haversin( NaN );
  // returns NaN