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diff --git a/src/include/glm/ext/quaternion_trigonometric.hpp b/src/include/glm/ext/quaternion_trigonometric.hpp
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+++ b/src/include/glm/ext/quaternion_trigonometric.hpp
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+/// @ref ext_quaternion_trigonometric
+/// @file glm/ext/quaternion_trigonometric.hpp
+///
+/// @defgroup ext_quaternion_trigonometric GLM_EXT_quaternion_trigonometric
+/// @ingroup ext
+///
+/// Provides trigonometric functions for quaternion types
+///
+/// Include <glm/ext/quaternion_trigonometric.hpp> to use the features of this extension.
+///
+/// @see ext_quaternion_float
+/// @see ext_quaternion_double
+/// @see ext_quaternion_exponential
+/// @see ext_quaternion_geometric
+/// @see ext_quaternion_relational
+/// @see ext_quaternion_transform
+
+#pragma once
+
+// Dependency:
+#include "../trigonometric.hpp"
+#include "../exponential.hpp"
+#include "scalar_constants.hpp"
+#include "vector_relational.hpp"
+#include <limits>
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_EXT_quaternion_trigonometric extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup ext_quaternion_trigonometric
+	/// @{
+
+	/// Returns the quaternion rotation angle.
+	///
+	/// @tparam T A floating-point scalar type
+	/// @tparam Q A value from qualifier enum
+	template<typename T, qualifier Q>
+	GLM_FUNC_DECL T angle(qua<T, Q> const& x);
+
+	/// Returns the q rotation axis.
+	///
+	/// @tparam T A floating-point scalar type
+	/// @tparam Q A value from qualifier enum
+	template<typename T, qualifier Q>
+	GLM_FUNC_DECL vec<3, T, Q> axis(qua<T, Q> const& x);
+
+	/// Build a quaternion from an angle and a normalized axis.
+	///
+	/// @param angle Angle expressed in radians.
+	/// @param axis Axis of the quaternion, must be normalized.
+	///
+	/// @tparam T A floating-point scalar type
+	/// @tparam Q A value from qualifier enum
+	template<typename T, qualifier Q>
+	GLM_FUNC_DECL qua<T, Q> angleAxis(T const& angle, vec<3, T, Q> const& axis);
+
+	/// @}
+} //namespace glm
+
+#include "quaternion_trigonometric.inl"