Add arcsin, arccos, arctan.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/eval.rs b/src/eval.rs
index c11614d..7c6ef5d 100644
--- a/src/eval.rs
+++ b/src/eval.rs
@@ -116,6 +116,18 @@ impl Num {
         float(self.as_float().tan())
     }
 
+    pub fn asin(self) -> Num {
+        float(self.as_float().asin())
+    }
+
+    pub fn acos(self) -> Num {
+        float(self.as_float().acos())
+    }
+
+    pub fn atan(self) -> Num {
+        float(self.as_float().atan())
+    }
+
     pub fn sqrt(self) -> Num {
         match self {
             Num::Int(i) if i >= 0 => {