Q. Find the reference angle for a rotation of 4π.Answer:
Definition of Reference Angle: The reference angle is the acute angle that a given angle makes with the x-axis. For angles in standard position (angles with their vertex at the origin and initial side on the positive x-axis), the reference angle is always between 0 and 2π radians (or 0 and 90 degrees).
Identification of Reference Angle: Since (π)/(4) is already between 0 and π/2, it is its own reference angle. There is no need for further calculation.