Find an angle in the normal range (0° to 360°, 0 to 2 pi radians) whose terminal side points in the same direction as the terminal side of an angle measuring 25pi/6.
An angle of the measure [tex]25\pi /6[/tex] should have the same measure as an angle measured [tex](25\pi /6)-2\pi[/tex] because this is periodic. We can then keep subtracting [tex]2\pi[/tex] from [tex]25\pi /6[/tex] until we get down to the smallest possible positive radian value: [tex]\frac{25\pi }{6} -\frac{12\pi }{6} -\frac{12\pi }{6} =\pi /6[/tex].
