Function angle_sc::trig::cosine_from_sine

source · 
pub fn cosine_from_sine(a: UnitNegRange, sign: f64) -> UnitNegRange
Expand description

Calculate the cosine of an Angle from it’s sine and the sign of the cosine.
See: swap_sin_cos.

  • a the sine of the angle.
  • sign the sign of the cosine of the angle.

return the cosine of the Angle.

§Examples

use angle_sc::trig::{UnitNegRange, cosine_from_sine};

assert_eq!(1.0, cosine_from_sine(UnitNegRange(0.0), 1.0).0);
assert_eq!(-1.0, cosine_from_sine(UnitNegRange(0.0), -1.0).0);