diff --git a/dsp/src/trig.rs b/dsp/src/cossin.rs
similarity index 100%
rename from dsp/src/trig.rs
rename to dsp/src/cossin.rs
diff --git a/dsp/src/lib.rs b/dsp/src/lib.rs
index 6dd20f7..ef0c131 100644
--- a/dsp/src/lib.rs
+++ b/dsp/src/lib.rs
@@ -18,10 +18,11 @@ pub fn shift_round(x: i32, shift: usize) -> i32 {
     (x + (1 << (shift - 1))) >> shift
 }
 
+pub mod atan2;
+pub mod cossin;
 pub mod iir;
 pub mod lockin;
 pub mod pll;
-pub mod trig;
 pub mod unwrap;
 
 #[cfg(test)]