sincospi_rrule

chainrules

Function sincospi_rrule 

Source 
pub fn sincospi_rrule<S: ScalarAd>(x: S, cotangents: (S, S)) -> S
Expand description

Reverse rule for sincospi.

ยงExamples

use chainrules::sincospi_rrule;

let dx = sincospi_rrule(0.25_f64, (1.0, 1.0));
assert!(
    (dx - (std::f64::consts::PI * (std::f64::consts::PI * 0.25_f64).cos()
        - std::f64::consts::PI * (std::f64::consts::PI * 0.25_f64).sin()))
        .abs()
        < 1e-12
);