diff --git a/Assignments/Assignment2/helper.hpp b/Assignments/Assignment2/helper.hpp
index dcde041..86a84ae 100644
--- a/Assignments/Assignment2/helper.hpp
+++ b/Assignments/Assignment2/helper.hpp
@@ -51,8 +51,8 @@ inline Vec3fa sample_phase_function(Vec3fa wo, float g, Vec2fa u, float& pdf) {
     Vec3fa tvec, bvec;
     build_basis(wo, tvec, bvec);
 
-    float sin_phi = std::sqrt(phi);
-    float cos_phi = std::sqrt(phi);
+    float sin_phi = std::sin(phi);
+    float cos_phi = std::cos(phi);
 
     Vec3fa inc_light = sin_theta * cos_phi * tvec +
                        sin_theta * sin_phi * bvec +