diff --git a/dsp/benches/cossin.rs b/dsp/benches/cossin.rs
index cbd0499..4e23774 100644
--- a/dsp/benches/cossin.rs
+++ b/dsp/benches/cossin.rs
@@ -1,12 +1,12 @@
+use core::f32::consts::PI;
 use criterion::{black_box, criterion_group, criterion_main, Criterion};
 use dsp::trig::cossin;
 
 fn cossin_bench(c: &mut Criterion) {
-    let z = -0x7304_2531_i32;
-    c.bench_function("cossin(z)", |b| b.iter(|| cossin(black_box(z))));
-    c.bench_function("(z as f32).sin_cos()", |b| {
-        b.iter(|| (black_box(z) as f32).sin_cos())
-    });
+    let zi = -0x7304_2531_i32;
+    let zf = zi as f32 / i32::MAX as f32 * PI;
+    c.bench_function("cossin(zi)", |b| b.iter(|| cossin(black_box(zi))));
+    c.bench_function("zf.sin_cos()", |b| b.iter(|| black_box(zf).sin_cos()));
 }
 
 criterion_group!(benches, cossin_bench);