diff --git a/include/libc64/math64.h b/include/libc64/math64.h
index acd6992b7..453c211d8 100644
--- a/include/libc64/math64.h
+++ b/include/libc64/math64.h
@@ -3,15 +3,46 @@
 
 #include "ultra64.h"
 
-f32 Math_FTanF(f32 angle);
-f32 Math_FFloorF(f32 x);
-f32 Math_FCeilF(f32 x);
-f32 Math_FRoundF(f32 x);
-f32 Math_FNearbyIntF(f32 x);
-f32 Math_FTruncF(f32 x);
+/**
+ * @param angle radians
+ * @return tan(angle)
+ */
+static inline f32 Math_FTanF(f32 angle) {
+    f32 sin = sinf(angle);
+    f32 cos = cosf(angle);
+
+    return sin / cos;
+}
+
+static inline f32 Math_FFloorF(f32 x) {
+    return floorf(x);
+}
+
+static inline f32 Math_FCeilF(f32 x) {
+    return ceilf(x);
+}
+
+static inline f32 Math_FRoundF(f32 x) {
+    return roundf(x);
+}
+
+static inline f32 Math_FTruncF(f32 x) {
+    return truncf(x);
+}
+
+static inline f32 Math_FNearbyIntF(f32 x) {
+    return nearbyintf(x);
+}
+
 f32 Math_FAtanF(f32 x);
 f32 Math_FAtan2F(f32 y, f32 x);
 f32 Math_FAsinF(f32 x);
-f32 Math_FAcosF(f32 x);
+
+/**
+ * @return arccos(x) in radians, in [0,pi] range
+ */
+static inline f32 Math_FAcosF(f32 x) {
+    return M_PI / 2 - Math_FAsinF(x);
+}
 
 #endif
diff --git a/src/libc64/math64.c b/src/libc64/math64.c
index 964dc3c8a..cfbe79d72 100644
--- a/src/libc64/math64.c
+++ b/src/libc64/math64.c
@@ -5,25 +5,6 @@
 s32 gUseAtanContFrac;
 #endif
 
-/**
- * @param angle radians
- * @return tan(angle)
- */
-f32 Math_FTanF(f32 angle) {
-    f32 sin = sinf(angle);
-    f32 cos = cosf(angle);
-
-    return sin / cos;
-}
-
-f32 Math_FFloorF(f32 x) {
-    return floorf(x);
-}
-
-f32 Math_FCeilF(f32 x) {
-    return ceilf(x);
-}
-
 #if PLATFORM_N64
 f64 Math_FAbs(f64 x) {
     return x < 0.0 ? -x : x;
@@ -34,18 +15,6 @@ f32 Math_FAbsF(f32 x) {
 }
 #endif
 
-f32 Math_FRoundF(f32 x) {
-    return roundf(x);
-}
-
-f32 Math_FTruncF(f32 x) {
-    return truncf(x);
-}
-
-f32 Math_FNearbyIntF(f32 x) {
-    return nearbyintf(x);
-}
-
 #if !PLATFORM_N64
 /* Arctangent approximation using a Taylor series (one quadrant) */
 f32 Math_FAtanTaylorQF(f32 x) {
@@ -239,10 +208,3 @@ f32 Math_FAtan2F(f32 y, f32 x) {
 f32 Math_FAsinF(f32 x) {
     return Math_FAtan2F(x, sqrtf(1.0f - SQ(x)));
 }
-
-/**
- * @return arccos(x) in radians, in [0,pi] range
- */
-f32 Math_FAcosF(f32 x) {
-    return M_PI / 2 - Math_FAsinF(x);
-}