diff --git a/include/Angle.h b/include/Angle.h
index 0220b40..b46cfac 100644
--- a/include/Angle.h
+++ b/include/Angle.h
@@ -14,6 +14,11 @@ class Angle {
   static float Clamp(float angle, float min, float max);
   static float Difference(float a, float b);
   static float MoveTowards(float fromAngle, float toAngle, float maxAngle);
+
+  static float CosineRuleSide(float a, float b, float gamma);
+  static float CosineRuleAngle(float a, float b, float c);
+
+  static float SineRuleAngle(float a, float beta, float c);
 };
 
 #endif
\ No newline at end of file
diff --git a/src/Angle.cpp b/src/Angle.cpp
index 4f68d3f..db0097d 100644
--- a/src/Angle.cpp
+++ b/src/Angle.cpp
@@ -37,3 +37,23 @@ float Angle::MoveTowards(float fromAngle, float toAngle, float maxAngle) {
   d = sign * Float::Clamp(fabs(d), 0, maxAngle);
   return fromAngle + d;
 }
+
+float Angle::CosineRuleSide(float a, float b, float gamma) {
+  float a2 = a * a;
+  float b2 = b * b;
+  float c = sqrtf(a2 + b2 - 2 * a * b * cos(gamma * Angle::Deg2Rad));
+  return c;
+}
+
+float Angle::CosineRuleAngle(float a, float b, float c) {
+  float a2 = a * a;
+  float b2 = b * b;
+  float c2 = c * c;
+  float gamma = acos((a2 + b2 - c2) / (2 * a * b)) * Angle::Rad2Deg;
+  return gamma;
+}
+
+float Angle::SineRuleAngle(float a, float beta, float b) {
+  float alpha = asin(a * sin(beta * Angle::Deg2Rad) / b);
+  return alpha;
+}
\ No newline at end of file