diff --git a/Angle.cpp b/Angle.cpp
index 676a7e8..ebc689d 100644
--- a/Angle.cpp
+++ b/Angle.cpp
@@ -213,9 +213,17 @@ float AngleOf<T>::Tan(AngleOf<T> a) {
 }
 
 template <typename T>
-AngleOf<T> Passer::LinearAlgebra::AngleOf<T>::Acos(float f) {
+AngleOf<T> AngleOf<T>::Acos(float f) {
   return AngleOf<T>::Radians(acosf(f));
 }
+template <typename T>
+AngleOf<T> AngleOf<T>::Asin(float f) {
+  return AngleOf<T>::Radians(asinf(f));
+}
+template <typename T>
+AngleOf<T> AngleOf<T>::Atan(float f) {
+  return AngleOf<T>::Radians(atanf(f));
+}
 
 template <>
 AngleOf<float> AngleOf<float>::CosineRuleSide(float a,
diff --git a/Angle.h b/Angle.h
index c4561e5..7befc46 100644
--- a/Angle.h
+++ b/Angle.h
@@ -64,6 +64,8 @@ class AngleOf {
   static float Tan(AngleOf<T> a);
 
   static AngleOf<T> Acos(float f);
+  static AngleOf<T> Asin(float f);
+  static AngleOf<T> Atan(float f);
 
   static AngleOf<T> CosineRuleSide(float a, float b, AngleOf<T> gamma);
   static AngleOf<T> CosineRuleAngle(float a, float b, float c);