diff --git a/SLS_C/src/builtin.c b/SLS_C/src/builtin.c
index ce13d5a..19e7160 100644
--- a/SLS_C/src/builtin.c
+++ b/SLS_C/src/builtin.c
@@ -656,6 +656,20 @@ Boolean load_builtins(InterpreterState *interpreter_state) {
         return FALSE; \
     } \
 
+#define FLOAT_FUNCTION(func) \
+    (void)ai; \
+    (void)type; \
+    \
+    StackItem *node = interpreter_state->stack; \
+    interpreter_state->stack = interpreter_state->stack->next; \
+    node->next = NULL; \
+    clean_stack(node); \
+    \
+    return push_token(interpreter_state, (Token){ \
+        .type = TOKEN_DOUBLE, \
+        .double_literal = func(af), \
+    }); \
+
 #define ARITHMETIC(op)  \
     StackItem *node = interpreter_state->stack; \
     interpreter_state->stack = interpreter_state->stack->next->next; \
@@ -988,18 +1002,18 @@ Boolean builtin_abs(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_acos(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(acos);
 }
 
 Boolean builtin_asin(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(asin);
 }
 
 Boolean builtin_atan(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(atan);
 }
 
 Boolean builtin_atan2(InterpreterState *interpreter_state) {
@@ -1033,8 +1047,8 @@ Boolean builtin_ceil(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_cos(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(cos);
 }
 
 Boolean builtin_depth(InterpreterState *interpreter_state) {
@@ -1090,13 +1104,13 @@ Boolean builtin_lambda(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_ln(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(log);
 }
 
 Boolean builtin_log(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(log10);
 }
 
 Boolean builtin_logb(InterpreterState *interpreter_state) {
@@ -1170,13 +1184,13 @@ Boolean builtin_shr(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_sin(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(sin);
 }
 
 Boolean builtin_sqrt(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(sqrt);
 }
 
 Boolean builtin_swap(InterpreterState *interpreter_state) {
@@ -1185,8 +1199,8 @@ Boolean builtin_swap(InterpreterState *interpreter_state) {
 }
 
 Boolean builtin_tan(InterpreterState *interpreter_state) {
-    (void)interpreter_state;
-    return FALSE;
+    NUMERIC_TYPE;
+    FLOAT_FUNCTION(tan);
 }
 
 Boolean builtin_type_of(InterpreterState *interpreter_state) {